bug#46509: 28.0.50; Unused static function in xfns.c with GTK2

[martin rudalics]

> > Its definition is conditional on !USE_GTK || !HAVE_GTK3, but its use
> > only on !USE_GTK.  Which one is right?
>
> The !USE_GTK one, I think.

It's a tad more complicated.  You have to do something like the below.

martin

diff --git a/src/xfns.c b/src/xfns.c
index 481ee0e225..82424ae080 100644
--- a/src/xfns.c
+++ b/src/xfns.c
@@ -4663,6 +4663,9 @@ x_get_net_workarea (struct x_display_info *dpyinfo, 
XRectangle *rect)
   return result;
 }

+#endif /* !defined USE_GTK || !defined HAVE_GTK3 */
+#if !defined USE_GTK
+
 /* Return monitor number where F is "most" or closest to.  */
 static int
 x_get_monitor_for_frame (struct frame *f,