Optimises a bit clampProjectionMatrix
Optimises a bit clampProjectionMatrix

jtorresfabra/osgjs,jtorresfabra/osgjs,cedricpinson/osgjs,hishamabdelrahman/osgjs,jtorresfabra/osgjs,cedricpinson/osgjs,hishamabdelrahman/osgjs,cedricpinson/osgjs,hishamabdelrahman/osgjs