Do not leak a cairo region
Do not leak a cairo region

This memory leak fix was present in GTK+ 3 since 3.10. We forgot
to backport it to GTK+ 2.

https://bugzilla.gnome.org/show_bug.cgi?id=738837

johne53/MB3Gtk-2,johne53/MB3Gtk-2,johne53/MB3Gtk-2,Distrotech/gtk,Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2,Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2