[Warzone2100/warzone2100] 2f816f: Re-add and fix up fallback for 1.4 ≤ OpenGL < 2....

[<no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/Warzone2100/warzone2100

  Commit: 2f816f5bf47ff2513fde638a012700180697b841
      https://github.com/Warzone2100/warzone2100/commit/2f816f5bf47ff2513fde638a012700180697b841
  Author: Cyp <cy...@wz...>
  Date:   2011-11-26 (Sat, 26 Nov 2011)

  Changed paths:
    M lib/ivis_opengl/piedraw.cpp
  M lib/ivis_opengl/piestate.cpp
  M lib/ivis_opengl/piestate.h
  M lib/ivis_opengl/screen.cpp

  Log Message:
  -----------
  Re-add and fix up fallback for 1.4 ≤ OpenGL < 2.0.

Patch by some linear combination of safety0ff, cybersphinx and Cyp.