pango/modules.c: Use G_DEFINE_TYPE instead custom macro
pango/modules.c: Use G_DEFINE_TYPE instead custom macro

https://bugzilla.gnome.org/show_bug.cgi?id=578018

kari-lentz/alpha-pango,kari-lentz/alpha-pango,kari-lentz/alpha-pango,Distrotech/pango,danny-ku/pango,Distrotech/pango,kari-lentz/alpha-pango,danny-ku/pango,danny-ku/pango,Distrotech/pango