utilize the variadic macro support in msvc newer than VS8
utilize the variadic macro support in msvc newer than VS8

https://bugzilla.gnome.org/show_bug.cgi?id=575373

MathieuDuponchelle/totem-pl-parser,pwithnall/totem-pl-parser,MathieuDuponchelle/totem-pl-parser,MathieuDuponchelle/totem-pl-parser,pwithnall/totem-pl-parser,MathieuDuponchelle/totem-pl-parser