arg: Fix memory leak in exception path in array conversion
arg: Fix memory leak in exception path in array conversion

https://bugzilla.gnome.org/show_bug.cgi?id=689343

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