avoid error on window close/cleanup: check we still have a backing!

git-svn-id: https://xpra.org/svn/Xpra/trunk@6192 3bb7dfac-3a0b-4e04-842a-767bc560f471
Xpra-org · Apr 27, 2014 · 02c7500 · 02c7500
1 parent 5ab3fe0
commit 02c7500
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/xpra/client/gtk_base/cairo_backing.py b/src/xpra/client/gtk_base/cairo_backing.py
@@ -56,8 +56,9 @@ def init(self, w, h):
         cr.fill()
 
     def close(self):
+        if self._backing:
+            self._backing.finish()
         GTKWindowBacking.close(self)
-        self._backing.finish()
 
     def paint_png(self, img_data, x, y, width, height, rowstride, options, callbacks):
         """ must be called from UI thread """