C Runtime linking warnings on OpenGL builds

[erorcun]

in VS2019 at least.

LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library

Game seems to work without issues, but they must be fixed.
Should be either librw, glfw or/and glew. Since we're compiling our own librw, and once I was compiling my own glfw, most suspicious library among them is glew.

[erorcun]

I don't see that anymore, maybe because of we removed glew.