RobertBeckebans/RBDOOM-3-BFG — pull request #194 by davidfoerster (2014-11-08 21:43:55+00:00)
Title: Fix or silence some compiler warning

I fixed or silenced a few compiler warnings I get with G++ 4.9.2:

- Multi-character constants
- Verify return values of functions that mandate it
- Macro re-definitions
- Use `static_assert` for compile-time assertions