BGE: Fix for issue #34242 "It does not render in "P" mode for Game engine if you UV mapa a face of a cube" reported by joaclint.

Material caching can now be disabled for Multitexture and GLSL Materials.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@54589 954f8c5b-7b00-dc11-b283-0030488c597c