cleanup (#2544)
cleanup (#2544)

replace `long long` with `int64_t`
jdryg/bgfx,LWJGL-CI/bgfx,emoon/bgfx,jdryg/bgfx,LWJGL-CI/bgfx,bkaradzic/bgfx,emoon/bgfx,jdryg/bgfx,bkaradzic/bgfx,LWJGL-CI/bgfx,jdryg/bgfx,emoon/bgfx,LWJGL-CI/bgfx,bkaradzic/bgfx,bkaradzic/bgfx