patch 8.0.0452: some macros are in lower case

Problem:    Some macros are in lower case.
Solution:   Make a few more macros upper case.
diff --git a/src/gui_w32.c b/src/gui_w32.c
index cd9f31e..fc566ab 100644
--- a/src/gui_w32.c
+++ b/src/gui_w32.c
@@ -7112,7 +7112,7 @@
 #else
 	    l = 1;
 #endif
-	    if (l == 1 && vim_iswhite(*pend)
+	    if (l == 1 && VIM_ISWHITE(*pend)
 					&& textWidth > maxDialogWidth * 3 / 4)
 		last_white = pend;
 	    textWidth += GetTextWidthEnc(hdc, pend, l);
@@ -8581,6 +8581,7 @@
 gui_mch_post_balloon(BalloonEval *beval, char_u *mesg)
 {
     POINT   pt;
+
     // TRACE0("gui_mch_post_balloon {{{");
     if (beval->showState == ShS_SHOWING)
 	return;
@@ -8588,8 +8589,8 @@
     ScreenToClient(s_textArea, &pt);
 
     if (abs(beval->x - pt.x) < 3 && abs(beval->y - pt.y) < 3)
-	/* cursor is still here */
     {
+	/* cursor is still here */
 	gui_mch_disable_beval_area(cur_beval);
 	beval->showState = ShS_SHOWING;
 	make_tooltip(beval, (char *)mesg, pt);