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/normal.c b/src/normal.c
index ca0d8ff..5ae9ff1 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -5401,7 +5401,7 @@
 # endif
 #endif
 	redraw_later(CLEAR);
-#if defined(WIN3264) && !defined(FEAT_GUI_W32)
+#if defined(MSWIN) && !defined(FEAT_GUI_MSWIN)
 	resize_console_buf();
 #endif
     }