message: Fallback to GLX_MESA_swap_control if GLX_EXT_swap_control isn't supported
diff: @@ -166,6 +166,12 @@ void GLContext::SwapBuffers(int SwapInterval)
  {
  glXSwapIntervalEXT(display, wnd, SwapInterval);
  }
  +# if GLX_MESA_swap_control
  + else if (glXSwapIntervalMESA != nullptr)
  + {
  + glXSwapIntervalMESA(SwapInterval);
  + }
  +# endif
  #endif
  glXSwapBuffers(display, wnd);
  }
  