patch 8.2.4415: function argument name conflicts with C++ keyword

Problem:    Function argument name conflicts with C++ keyword.
Solution:   Rename the argument.
diff --git a/src/proto/usercmd.pro b/src/proto/usercmd.pro
index 8eda5a3..c3ac79c 100644
--- a/src/proto/usercmd.pro
+++ b/src/proto/usercmd.pro
@@ -1,6 +1,6 @@
 /* usercmd.c */
 char_u *find_ucmd(exarg_T *eap, char_u *p, int *full, expand_T *xp, int *complp);
-char_u *set_context_in_user_cmdarg(char_u *cmd, char_u *arg, long argt, int compl, expand_T *xp, int forceit);
+char_u *set_context_in_user_cmdarg(char_u *cmd, char_u *arg, long argt, int context, expand_T *xp, int forceit);
 char_u *set_context_in_user_cmd(expand_T *xp, char_u *arg_in);
 char_u *expand_user_command_name(int idx);
 char_u *get_user_commands(expand_T *xp, int idx);
diff --git a/src/usercmd.c b/src/usercmd.c
index 53285bd..d4a7a9c 100644
--- a/src/usercmd.c
+++ b/src/usercmd.c
@@ -303,29 +303,29 @@
 	char_u		*cmd UNUSED,
 	char_u		*arg,
 	long		argt,
-	int		compl,
+	int		context,
 	expand_T	*xp,
 	int		forceit)
 {
     char_u	*p;
 
-    if (compl == EXPAND_NOTHING)
+    if (context == EXPAND_NOTHING)
 	return NULL;
 
     if (argt & EX_XFILE)
     {
 	// EX_XFILE: file names are handled before this call
-	xp->xp_context = compl;
+	xp->xp_context = context;
 	return NULL;
     }
 
 #ifdef FEAT_MENU
-    if (compl == EXPAND_MENUS)
+    if (context == EXPAND_MENUS)
 	return set_context_in_menu_cmd(xp, cmd, arg, forceit);
 #endif
-    if (compl == EXPAND_COMMANDS)
+    if (context == EXPAND_COMMANDS)
 	return arg;
-    if (compl == EXPAND_MAPPINGS)
+    if (context == EXPAND_MAPPINGS)
 	return set_context_in_map_cmd(xp, (char_u *)"map", arg, forceit, FALSE,
 							FALSE, CMD_map);
     // Find start of last argument.
@@ -340,7 +340,7 @@
 	MB_PTR_ADV(p);
     }
     xp->xp_pattern = arg;
-    xp->xp_context = compl;
+    xp->xp_context = context;
 
     return NULL;
 }
diff --git a/src/version.c b/src/version.c
index 5039e9e..f313448 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4415,
+/**/
     4414,
 /**/
     4413,