Fix r_ext_framebuffer_multisample > 0 causing the screen to always be solid black when using AMD Windows driver.
The AMD Windows driver requires binding renderbuffer for it to be valid. The OpenGL2 renderer uses GL_EXT_direct_state_access that shouldn't require this. It would be required for Core and GL_ARB_direct_state_access. It seems like a driver bug.
Fix r_ext_framebuffer_multisample > 0 causing the screen to always be solid black when using AMD Windows driver.
The AMD Windows driver requires binding renderbuffer for it to be valid. The OpenGL2 renderer uses GL_EXT_direct_state_access that shouldn't require this. It would be required for Core and GL_ARB_direct_state_access. It seems like a driver bug.
Reported on the ioquake3 forum.