* Use c++ methods as much as possible.
* Use enum types for accessing NavMesh objects from array.
* Use size_t for for loops when testing against size types.
* Don't compute strlen twice of more on the same string.
* Don't use unnecessary c string casts if there is a method with a std::string overload.
* Don't create string objects from string pointers if we could use them directly.
* Don't initialize RCON password twice on each change, and don't set if the new password equals the old.
Moved logging functions to dbg.h (tier0) and export them from the dll.
Added additional functions for checking bad pointers (debug only!).
Reduced output code size.
This crash happens when the BSP is missing a lot of shaders and materials.
The call originates from 'R_DrawWorldMeshesDepthOnly()', but it is unclear which missing shader is causing the nullptr. checking for a nullptr here should be sufficient to deal with this kind of missing shader
