[metacity] fix meta_window_titlebar_is_onscreen for titlebar-less windows

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 5348112a55ac8d960c014bccc2eda508177ea448
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Wed Mar 5 19:40:09 2014 -0500

    fix meta_window_titlebar_is_onscreen for titlebar-less windows
    
    Make the code correspond to the comment - the titlebar can't be
    offscreen if there's no titlebar.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=723580

 src/core/window.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index a8fd3b8e..6aea86d9 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -7333,7 +7333,7 @@ meta_window_titlebar_is_onscreen (MetaWindow *window)
 
   /* Titlebar can't be offscreen if there is no titlebar... */
   if (!window->frame)
-    return FALSE;
+    return TRUE;
 
   /* Get the rectangle corresponding to the titlebar */
   meta_window_get_titlebar_rect (window, &titlebar_rect);