KhronosGroup/glTF — pull request #206 by emackey (2013-12-10 19:04:49+00:00)
Title: VS2013 needs <stdarg.h> for va_start and va_end.

Fix the build on Visual Studio 2013. It also needs the fix from [OpenCOLLADA#225](https://github.com/KhronosGroup/OpenCOLLADA/pull/255)