correctly initialize the _gi_cairo_functions array to be zero filled
correctly initialize the _gi_cairo_functions array to be zero filled

thiblahute/pygobject,GNOME/pygobject,MathieuDuponchelle/pygobject,davidmalcolm/pygobject,davibe/pygobject,jdahlin/pygobject,choeger/pygobject-cmake,MathieuDuponchelle/pygobject,GNOME/pygobject,davidmalcolm/pygobject,jdahlin/pygobject,sfeltman/pygobject,choeger/pygobject-cmake,thiblahute/pygobject,davidmalcolm/pygobject,thiblahute/pygobject,pexip/pygobject,sfeltman/pygobject,GNOME/pygobject,pexip/pygobject,davibe/pygobject,davibe/pygobject,jdahlin/pygobject,choeger/pygobject-cmake,MathieuDuponchelle/pygobject,pexip/pygobject,davibe/pygobject,sfeltman/pygobject