[libssh2] Problem found in blocking mode

I found a problem in blocking mode, this is causing the problems in
the ssh2.c example. The problem is in libssh2_packet_requirev_ex()
in these lines:

     while (session->socket_state != LIBSSH2_SOCKET_DISCONNECTED) {
         int ret = libssh2_packet_read(session);
         if ((ret < 0) && (ret != PACKET_EAGAIN)) {
             state->start = 0;
             return ret;
         }
         if (ret <= 0) {
             long left = LIBSSH2_READ_TIMEOUT - (time(NULL) - state-
>start);

             if ((left <= 0) || (libssh2_waitsocket(session, left) <=
0 )) {
                 state->start = 0;
                 return PACKET_TIMEOUT;
             }
             else if (ret == PACKET_EAGAIN) {
                 return PACKET_EAGAIN;
             }
         }

         if (strchr((char *)packet_types, ret)) {
             /* Be lazy, let packet_ask pull it out of the brigade */
             return libssh2_packet_askv_ex(session, packet_types,
data, data_len, match_ofs, match_buf, match_len, 0);
         }
     }

libssh2_packet_read() is returning -1

Jim

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