fix the bug when choosing no bias in cfsm (#1148)
fix the bug when choosing no bias in cfsm (#1148)


danielhers/dynet,clab/cnn,clab/dynet,danielhers/dynet,danielhers/dynet,chunyang-wen/dynet,clab/dynet,shuheik/dynet,danielhers/dynet,shuheik/dynet,shuheik/dynet,danielhers/dynet,chunyang-wen/dynet,clab/dynet,clab/cnn,clab/dynet,chunyang-wen/dynet,clab/dynet,danielhers/dynet,chunyang-wen/dynet,danielhers/dynet,clab/dynet,shuheik/dynet,shuheik/dynet,shuheik/dynet,clab/dynet,clab/cnn,shuheik/dynet