typo
typo

Former-commit-id: 738fe5aaaab6c99b2ac49f6b2c33c34cbd84dcc1
clab/dynet,clab/dynet,danielhers/dynet,clab/cnn,shuheik/dynet,clab/dynet,clab/cnn,shuheik/dynet,chunyang-wen/dynet,shuheik/dynet,danielhers/dynet,shuheik/dynet,danielhers/dynet,xunzhang/dynet,chunyang-wen/dynet,shuheik/dynet,shuheik/dynet,xunzhang/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,clab/dynet,clab/dynet,clab/cnn,xunzhang/dynet,danielhers/dynet,clab/dynet,xunzhang/dynet,danielhers/dynet,chunyang-wen/dynet,chunyang-wen/dynet,danielhers/dynet