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/gui_gtk_x11.c b/src/gui_gtk_x11.c
index b76aacd..5e74adc 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -86,7 +86,7 @@
# include <gdk/gdkkeysyms.h>
# endif
# include <gdk/gdk.h>
-# ifdef WIN3264
+# ifdef MSWIN
# include <gdk/gdkwin32.h>
# else
# include <gdk/gdkx.h>