Moved the destructor block->release to after the cancel().
Moved the destructor block->release to after the cancel().


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