[gtk+/gtk-2-18] Plug a pixmap leak

[Matthias Clasen <matthiasc src gnome org>]

commit 0e17e8daa551193b9c3b1922f152eaafe6167957
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jan 11 10:23:57 2010 -0500

    Plug a pixmap leak
    
    We were getting our refcounts tangled up when setting drawable clips on
    GCs with CSW, leading to a pretty bad pixmap leak. See bug 606143.
    (cherry picked from commit d32b061895378aa721cca52065608e1b34a60e2b)

 gdk/gdkgc.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkgc.c b/gdk/gdkgc.c
index 44c2aa7..ae27bcb 100644
--- a/gdk/gdkgc.c
+++ b/gdk/gdkgc.c
@@ -680,6 +680,7 @@ _gdk_gc_add_drawable_clip (GdkGC     *gc,
 			      -1, -1);
 	  gdk_gc_set_clip_region (tmp_gc, NULL);
 	  gdk_gc_set_clip_mask (gc, new_mask);
+	  g_object_unref (new_mask);
 	}
       else if (overlap == GDK_OVERLAP_RECTANGLE_OUT)
 	{