Addd an #ifdef _WIN32 to force SingleThreaded usage under Windows when no threading model is specified.
Addd an #ifdef _WIN32 to force SingleThreaded usage under Windows when no
threading model is specified.


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