patch 8.1.1097: Motif build fails

Problem:    Motif build fails. (Paul Jolly)
Solution:   Only use gui_mch_maximized() for MS-Windows. (closes #4194)

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1097,
 /**/
     1096,
 /**/