ff1a6546da
Commit 5b8ba60c was added because of a memory leak when gtksink was used as renderer. Nonetheless the patch didn't consider two facts: 1\ that the gtk_sink element was in floating state 2\ there is another code path where the gtk_sink element is already sank Thus the correct fix, is not to ref and unref gtk_sink, but sink it. https://bugzilla.gnome.org/show_bug.cgi?id=781904