Skip only user_data in callbacks
Skip only user_data in callbacks

Previously, all void* arguments in callbacks were skipped. Now we
check in the closure id in the caching layer and correctly mark
them skipped.

https://bugzilla.gnome.org/show_bug.cgi?id=654406

djdeath/gjs,pixunil/cjs,magcius/gjs,pixunil/cjs,endlessm/gjs,magcius/gjs,djdeath/gjs,endlessm/gjs,magcius/gjs,mtwebster/cjs,pixunil/cjs,magcius/gjs,mtwebster/cjs,magcius/gjs,pixunil/cjs,mtwebster/cjs,djdeath/gjs,endlessm/gjs,mtwebster/cjs,endlessm/gjs,djdeath/gjs,mtwebster/cjs,djdeath/gjs,endlessm/gjs,pixunil/cjs