Fixed a define for __sgi.  Irix does not allow dlsym(0L, ...) without calling dlopen() first, just like __sun
Fixed a define for __sgi.  Irix does not allow dlsym(0L, ...) without
calling dlopen() first, just like __sun


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