Razish/OpenJK — pull request #243 by RavuAlHemio (2013-05-12 14:21:58+00:00)
Title: snapvector.c -> .cpp, remove win_shared SnapVector

* Convert snapvector.c to C++ as snapvector.cpp.
* Remove Sys_SnapVector from win_shared.cpp, as it doesn't care about the
rounding mode and that might introduce behavior differences between platforms.