Fixed GCC errors & warnings.
Fixed GCC errors & warnings.

bkaradzic/bgfx,emoon/bgfx,LWJGL-CI/bgfx,LWJGL-CI/bgfx,emoon/bgfx,emoon/bgfx,bkaradzic/bgfx,jdryg/bgfx,jdryg/bgfx,jdryg/bgfx,bkaradzic/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,jdryg/bgfx,LWJGL-CI/bgfx