fixed vc9-specific unordered_map of pair compile issue
fixed vc9-specific unordered_map of pair compile issue

sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,robertkhamilton/sirikata,sirikata/sirikata,robertkhamilton/sirikata,robertkhamilton/sirikata,sirikata/sirikata,sirikata/sirikata