OS X: When targeting 10.6 only - Fixed an issue with old framebuffer contents being displayed when using non-native resolution full screen contexts. Also fixed a crash when switching resolutions.  Added some error checking to the full screen context creation.
OS X: When targeting 10.6 only - Fixed an issue with old framebuffer contents being displayed when using non-native resolution full screen contexts. Also fixed a crash when switching resolutions.  Added some error checking to the full screen context creation.

--HG--
branch : v1-7

digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre,digimatic/ogre