[metacity/gnome-3-22] frames: avoid a deprecation warning

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 5f2cbccb6e49f0e99385047660af80a9731390e8
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Oct 24 18:58:50 2016 +0300

    frames: avoid a deprecation warning

 src/ui/frames.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/ui/frames.c b/src/ui/frames.c
index 31fe269..eee61ea 100644
--- a/src/ui/frames.c
+++ b/src/ui/frames.c
@@ -2235,7 +2235,10 @@ setup_bg_cr (cairo_t *cr, GdkWindow *window, int x_offset, int y_offset)
   GdkWindow *parent = gdk_window_get_parent (window);
   cairo_pattern_t *bg_pattern;
 
+  G_GNUC_BEGIN_IGNORE_DEPRECATIONS
   bg_pattern = gdk_window_get_background_pattern (window);
+  G_GNUC_END_IGNORE_DEPRECATIONS
+
   if (bg_pattern == NULL && parent)
     {
       gint window_x, window_y;