Fixed inconsistent initialization in Py and C++
Fixed inconsistent initialization in Py and C++


Former-commit-id: b0f2ea6d93f24f5dfc3a74d7cc9792d2e500dd0e
xunzhang/dynet,clab/dynet,chunyang-wen/dynet,clab/cnn,xunzhang/dynet,shuheik/dynet,danielhers/dynet,danielhers/dynet,chunyang-wen/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,shuheik/dynet,clab/cnn,shuheik/dynet,clab/dynet,xunzhang/dynet,shuheik/dynet,danielhers/dynet,clab/dynet,clab/dynet,clab/cnn,danielhers/dynet,chunyang-wen/dynet,shuheik/dynet,xunzhang/dynet,clab/dynet,clab/dynet,danielhers/dynet,shuheik/dynet,danielhers/dynet,chunyang-wen/dynet