patch 8.1.0941: macros for MS-Windows are inconsistent

Problem:    Macros for MS-Windows are inconsistent, using "32", "3264 and
            others.
Solution:   Use MSWIN for all MS-Windows builds.  Use FEAT_GUI_MSWIN for the
            GUI build. (Hirohito Higashi, closes #3932)
diff --git a/src/menu.c b/src/menu.c
index 085d0e7..41669ed 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -18,7 +18,7 @@
 
 #define MENUDEPTH   10		/* maximum depth of menus */
 
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 static int add_menu_path(char_u *, vimmenu_T *, int *, char_u *, int);
 #else
 static int add_menu_path(char_u *, vimmenu_T *, int *, char_u *);
@@ -35,7 +35,7 @@
 static char_u *popup_mode_name(char_u *name, int idx);
 static char_u *menu_text(char_u *text, int *mnemonic, char_u **actext);
 
-#if defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF)
 static void gui_create_tearoffs_recurse(vimmenu_T *menu, const char_u *pname, int *pri_tab, int pri_idx);
 static void gui_add_tearoff(char_u *tearpath, int *pri_tab, int pri_idx);
 static void gui_destroy_tearoffs_recurse(vimmenu_T *menu);
@@ -43,7 +43,7 @@
 #endif
 
 static int menu_is_hidden(char_u *name);
-#if defined(FEAT_CMDL_COMPL) || (defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF))
+#if defined(FEAT_CMDL_COMPL) || (defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF))
 static int menu_is_tearoff(char_u *name);
 #endif
 
@@ -122,7 +122,7 @@
     int		i;
 #if defined(FEAT_GUI) && !defined(FEAT_GUI_GTK)
     int		old_menu_height;
-# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
     int		old_toolbar_height;
 # endif
 #endif
@@ -295,7 +295,7 @@
     }
 #if defined(FEAT_GUI) && !(defined(FEAT_GUI_GTK) || defined(FEAT_GUI_PHOTON))
     old_menu_height = gui.menu_height;
-# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
     old_toolbar_height = gui.toolbar_height;
 # endif
 #endif
@@ -381,7 +381,7 @@
 	menuarg.noremap[0] = noremap;
 	menuarg.silent[0] = silent;
 	add_menu_path(menu_path, &menuarg, pri_tab, map_to
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 		, TRUE
 #endif
 		);
@@ -405,7 +405,7 @@
 			menuarg.icon_builtin = FALSE;
 #endif
 			add_menu_path(p, &menuarg, pri_tab, map_to
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 				, TRUE
 #endif
 					 );
@@ -421,7 +421,7 @@
     /* If the menubar height changed, resize the window */
     if (gui.in_use
 	    && (gui.menu_height != old_menu_height
-# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32)
+# if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN)
 		|| gui.toolbar_height != old_toolbar_height
 # endif
 	    ))
@@ -455,7 +455,7 @@
 				   icon_builtin, silent[0], noremap[0] */
     int		*pri_tab,
     char_u	*call_data
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
     , int	addtearoff	/* may add tearoff item */
 #endif
     )
@@ -537,7 +537,7 @@
 		    goto erret;
 		}
 		if (*next_name != NUL && menu->children == NULL
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 			&& addtearoff
 #endif
 			)
@@ -630,7 +630,7 @@
 	    if (*next_name == NUL && menuarg->iconfile != NULL)
 		menu->iconfile = vim_strsave(menuarg->iconfile);
 #endif
-#if defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF)
 	    /* the tearoff item must be present in the modes of each item. */
 	    if (parent != NULL && menu_is_tearoff(parent->children->dname))
 		parent->children->modes |= modes;
@@ -645,7 +645,7 @@
 	     * modes, then make sure it's available for this one now
 	     * Also enable a menu when it's created or changed.
 	     */
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 	    /* If adding a tearbar (addtearoff == FALSE) don't update modes */
 	    if (addtearoff)
 #endif
@@ -680,7 +680,7 @@
 		}
 	    }
 
-# if defined(FEAT_GUI_W32) & defined(FEAT_TEAROFF)
+# if defined(FEAT_GUI_MSWIN) & defined(FEAT_TEAROFF)
 	    /* When adding a new submenu, may add a tearoff item */
 	    if (	addtearoff
 		    && *next_name
@@ -758,7 +758,7 @@
 		c = 0;
 		d = 0;
 		if (amenu && call_data != NULL && *call_data != NUL
-#ifdef FEAT_GUI_W32
+#ifdef FEAT_GUI_MSWIN
 		       && addtearoff
 #endif
 				       )
@@ -808,7 +808,7 @@
 		menu->silent[i] = menuarg->silent[0];
 	    }
 	}
-#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32) \
+#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN) \
 	&& (defined(FEAT_BEVAL_GUI) || defined(FEAT_GUI_GTK))
 	/* Need to update the menu tip. */
 	if (modes & MENU_TIP_MODE)
@@ -938,7 +938,7 @@
 	    }
 	    if ((menu->modes & modes) != 0x0)
 	    {
-#if defined(FEAT_GUI_W32) & defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) & defined(FEAT_TEAROFF)
 		/*
 		 * If we are removing all entries for this menu,MENU_ALL_MODES,
 		 * Then kill any tearoff before we start
@@ -992,7 +992,7 @@
 
 	/* Recalculate modes for menu based on the new updated children */
 	menu->modes &= ~modes;
-#if defined(FEAT_GUI_W32) & defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) & defined(FEAT_TEAROFF)
 	if ((s_tearoffs) && (menu->children != NULL)) /* there's a tear bar.. */
 	    child = menu->children->next; /* don't count tearoff bar */
 	else
@@ -1003,7 +1003,7 @@
 	if (modes & MENU_TIP_MODE)
 	{
 	    free_menu_string(menu, MENU_INDEX_TIP);
-#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_W32) \
+#if defined(FEAT_TOOLBAR) && !defined(FEAT_GUI_MSWIN) \
 	    && (defined(FEAT_BEVAL_GUI) || defined(FEAT_GUI_GTK))
 	    /* Need to update the menu tip. */
 	    if (gui.in_use)
@@ -1013,7 +1013,7 @@
 	if ((menu->modes & MENU_ALL_MODES) == 0)
 	{
 	    /* The menu item is no longer valid in ANY mode, so delete it */
-#if defined(FEAT_GUI_W32) & defined(FEAT_TEAROFF)
+#if defined(FEAT_GUI_MSWIN) & defined(FEAT_TEAROFF)
 	    if (s_tearoffs && menu->children != NULL) /* there's a tear bar.. */
 		free_menu(&menu->children);
 #endif
@@ -1867,7 +1867,7 @@
 }
 
 #if defined(FEAT_CMDL_COMPL) \
-	|| (defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF))
+	|| (defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF))
 /*
  * Return TRUE if the menu is the tearoff menu.
  */
@@ -2031,7 +2031,7 @@
     while (menu)
     {
 	if ((menu->modes & menu->enabled & mode)
-# if defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF)
+# if defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF)
 		|| menu_is_tearoff(menu->dname)
 # endif
 	   )
@@ -2105,7 +2105,7 @@
 # endif
 #endif /* FEAT_GUI */
 
-#if (defined(FEAT_GUI_W32) && defined(FEAT_TEAROFF)) || defined(PROTO)
+#if (defined(FEAT_GUI_MSWIN) && defined(FEAT_TEAROFF)) || defined(PROTO)
 
 /*
  * Deal with tearoff items that are added like a menu item.
@@ -2257,7 +2257,7 @@
     }
 }
 
-#endif /* FEAT_GUI_W32 && FEAT_TEAROFF */
+#endif /* FEAT_GUI_MSWIN && FEAT_TEAROFF */
 
 /*
  * Execute "menu".  Use by ":emenu" and the window toolbar.