gi: do not collect user_data argument(s) for callbacks when not passed
gi: do not collect user_data argument(s) for callbacks when not passed

https://bugzilla.gnome.org/show_bug.cgi?id=611590

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