obfsproxy: wrong check of return value of proto_conn_create()
In network.c:open_outbound() and network.c:open_outbound_hostname():
...
newconn = proto_conn_create(conn->cfg);
if (!conn) {
log_warn("%s: failed to allocate state for outbound connection",
conn->peername);
bufferevent_free(buf);
return NULL;
}
...
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