Crash (black screen) when disabling shaders

[Calinou]

To reproduce: type /shaders 0 and confirm. The CPU usage remains fairly low even though the screen is black and you can't do anything.

Some other settings that require confirmation like /fsaa (anti-aliasing) or /aniso (anisotropic filtering) work.

Firefox 29 ‑ Xubuntu 14.04, 64 bits ‑ NVIDIA 331.38, GeForce GTX 570

[noahcoetsee]

@kripken

Console Ouput for this error:

Rendering using the OpenGL fixed-function path.
could not load texture packages/textures/default.png

It seems there are many files missing from your implementation that prevent the full execution of shader change....