From Roland Smeenk, Added missing initialization to zero of the _carryOver value in default and copy constructor.
From Roland Smeenk, Added missing initialization to zero of the _carryOver value in
default and copy constructor.


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