Comment 3 for bug 979959

StacktraceTop:
 gtk_widget_size_allocate (widget=0x0, allocation=0x7fff56391130) at /build/buildd/gtk+3.0-3.4.0/./gtk/gtkwidget.c:4872
 ?? () from /tmp/tmpLg5uJs/usr/lib/libgnome-control-center.so.1
 g_cclosure_marshal_VOID__BOXEDv (closure=0x7fb2903e1d30, return_value=<optimized out>, instance=0x7fb290845120, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x7fb2903e1da0) at /build/buildd/glib2.0-2.32.0/./gobject/gmarshal.c:1160
 _g_closure_invoke_va (closure=0x7fb2903e1d30, return_value=0x0, instance=0x7fb290845120, args=0x7fff56391468, n_params=1, param_types=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gclosure.c:840
 g_signal_emit_valist (instance=0x7fb290845120, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3207