Fix wrong refcount for GVariant property defaults
Fix wrong refcount for GVariant property defaults

Drop the bogus DECREF for the GVariant default argument, as we need to keep it
around in the class. Otherwise the refcount drops to zero, and the next
garbage collection run causes segfaults.

https://bugzilla.gnome.org/show_bug.cgi?id=689267

sfeltman/pygobject,GNOME/pygobject,pexip/pygobject,davibe/pygobject,GNOME/pygobject,GNOME/pygobject,pexip/pygobject,sfeltman/pygobject,davibe/pygobject,davibe/pygobject,sfeltman/pygobject,pexip/pygobject,davibe/pygobject