connect: Close possibly leaking socket

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit c36bd2304a)

src/connect.c

@@ -281,6 +281,9 @@ socket_t ssh_connect_host_nonblocking(ssh_session session, const char *host,
      * connection, otherwise return the first address without error or error */
     if (s == -1) {
         s = first;
+    } else if (s != first) {
+        /* Clean up the saved socket */
+        ssh_connect_socket_close(first);
     }
 
     return s;