Changed the shadow texture implemention to use CLAMP_TO_BORDER for the WRAP_S and _T modes.  Also set the border colour to 1,1,1,1 to ensure problem blending.
Changed the shadow texture implemention to use CLAMP_TO_BORDER for the
WRAP_S and _T modes.  Also set the border colour to 1,1,1,1 to ensure
problem blending.


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