Prevent possible null pointer exception during iOS layoutSubviews - when no viewport is attached to the camera
Prevent possible null pointer exception during iOS layoutSubviews - when no viewport is attached to the camera

--HG--
branch : v1-8
extra : source : 3461c15a9615489242ce6416cbe11ba0792c706a

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