GLES2 fixes

http://stackoverflow.com/questions/11489238/opengl-es-2-0-texture-showing-up-black

"You don't use glEnable for textures when you're using shaders. glEnable(GL_TEXTURE_2D) is only for fixed function pipeline, and thus it is not a valid operation in opengles2.0. Just remove the line completely. "

Fixes several errors reported on Adreno devices when doing an OpenGL trace.