Adjusted OGL version-check for the EXT/ARB_texture_env_combine extension from 1.4 to 1.3
Adjusted OGL version-check for the EXT/ARB_texture_env_combine extension from 1.4 to 1.3

Alexpux/Coin3D,Alexpux/Coin3D,Alexpux/Coin3D,Alexpux/Coin3D