Fix [3535939]: In CompositorInstance::getTargetForTex search also for referenced texture name if referencing another compositor's texture
Fix [3535939]: In CompositorInstance::getTargetForTex search also for referenced texture name if referencing another compositor's texture

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branch : v1-8

nezticle/ogre,vancepym/ogre,vancepym/ogre,nezticle/ogre,vancepym/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,nezticle/ogre,vancepym/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,nezticle/ogre,vancepym/ogre