patch 9.0.1563: GTK3: window manager resize hints are incomplete

Problem:    GTK3: window manager resize hints are incomplete.
Solution:   Use NULL for second argument of gtk_window_set_geometry_hints().
            (Kenny Stauffer closes #11055)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1563,
 /**/
     1562,
 /**/