cocos2d/cocos2d-x — pull request #2243 by sbc100 (2013-03-21 19:17:37+00:00)
Title: Fix linux compilation of CCTexturePVR.cpp

On linux (and possibly other platforms)
GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG is simply not defined since we don't
include GLES/gl2ext.h.