Added if (!null) guard around description strings.
Added if (!null) guard around description strings.


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