Fixed bug, that save weights-file for each iteration

AlexeyAB

2018-03-16 164ba34279a4d486d6e49409de791817b62ad1ac

 src/http_stream.cpp

@@ -37,6 +37,7 @@
#define SOCKET_ERROR   -1
#endif /* _WIN32 */

#include <cstdio>
#include <vector>
#include <iostream>
using std::cerr;