bge bugfix: [#34517] 2D Filter causes mouselook script drifting effect (patch by Daniel Stokes - Kupoman)
Fix for 2.66a

""We can't pass the results of canvas->GetViewPort() directly because canvas->SetViewPort() does some extra math""
Bug introduced during 2.65 series in the refactor to use canvas->SetViewPort instead of direct opengl calls for viewport
(53305, 53392, 53393)


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@55011 954f8c5b-7b00-dc11-b283-0030488c597c