title: glCheckFramebufferStatus returns 0 and no error in glGetError
body: <p>glCheckFramebufferStatus returns 0 and there is no error returned from glGetError afterwards. Is it safe to assume that this is a driver bug? I can't seem to find anything in the documentation for OpenGL in how to handle this situation.</p>
  
  <p>I am writing a game using SDL2 on Linux (Ubuntu 14.04) with the nvidia proprietary drivers. </p>