glib-2.0: Make SourceFuncs a struct
glib-2.0: Make SourceFuncs a struct

Thanks to Paula Jakma for the patch.

Fixes bug 669756.

GNOME/vala,tjol/vala-tjol,tjol/vala-tjol,severinh/vala,frida/vala,GNOME/vala,GNOME/vala,flobrosch/vala-fixes,frida/vala,spidermonkdust/vala,rvu95/vala,GNOME/vala,frida/vala,Distrotech/vala,playya/vala,spidermonkdust/vala,flobrosch/vala-fixes,frida/vala,severinh/vala,frida/vala,Distrotech/vala,playya/vala,Distrotech/vala,rvu95/vala,playya/vala,rvu95/vala,xdave/pvala,jessevdk/vala,spidermonkdust/vala,flobrosch/vala-fixes,jessevdk/vala,severinh/vala,jessevdk/vala,tjol/vala-tjol