Some more fixes.

Fixes for the above(i.e. below) - mentioned fixes. Shouldn't crash under Mesa 3D anymore, though i dunno how it looks, with pretty much minimal quality.
Important changes:

• Fixed broken reverb (should sound lot better).
  
• Fixed segfault in shipped openal-soft.
  
• Fixed a bunch of segfaults on older graphics hardware, it should draw at reduced quality now.