Reverted part of revision r12294 that introduced threading related problems under X11 due to checking the _display Display member variable assigned to the graphics thread from the main thread.
Reverted part of revision r12294 that introduced threading related problems under X11 due to checking the _display
Display member variable assigned to the graphics thread from the main thread.


XiaoCC/osg,ntoand/osg,XiaoCC/osg,ghub/osg,XiaoCC/osg,ghub/osg,ntoand/osg,ntoand/osg,stmh/osg,koshman86/osg,artoolkit/osg,stmh/osg,koshman86/osg,omega-hub/osg,artoolkit/osg,stmh/osg,XiaoCC/osg,ghub/osg,ghub/osg,artoolkit/osg,XiaoCC/osg,ntoand/osg,stmh/osg,stmh/osg,koshman86/osg,koshman86/osg,omega-hub/osg,omega-hub/osg,omega-hub/osg,artoolkit/osg