Work around leak in older pygobject
Work around leak in older pygobject

With older pygobject, any use of the default getter/setters
generated by gobject.property() would leak. If we detect this
is the case, monkey patch in the fixed version of the default
getters/setters.
(See  https://bugzilla.gnome.org/show_bug.cgi?id=644039)

alexey4petrov/reinteract,alexey4petrov/reinteract,alexey4petrov/reinteract