Fix the GList → SV conversion
Fix the GList → SV conversion

interface_to_sv expects a GArgument*, and arg->v_pointer is apparently
not necessarily equal to arg, so simply passing a raw pointer doesn't
always work.  So construct a temporary GArgument and pass that on.

cpanxaoc/perl-Glib-Object-Introspection,potyl/perl-Glib-Object-Introspection,cpanxaoc/perl-Glib-Object-Introspection,GNOME/perl-Glib-Object-Introspection,GNOME/perl-Glib-Object-Introspection,zpmorgan/gi,potyl/perl-Glib-Object-Introspection,zpmorgan/gi