iOS: Fix a compile issue in the GL ES 1 rendersystem
iOS: Fix a compile issue in the GL ES 1 rendersystem

--HG--
branch : v1-8

bhlzlx/ogre,ehsan/ogre,bhlzlx/ogre,ehsan/ogre,ruleless/ogre,ruleless/ogre,bhlzlx/ogre,ehsan/ogre,bhlzlx/ogre,ehsan/ogre,bhlzlx/ogre,bhlzlx/ogre,ruleless/ogre,ruleless/ogre,ruleless/ogre,ruleless/ogre,ehsan/ogre