sheepdog: don't leak socket file descriptor upon connection failure

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit a7e47d4bfcbf256fae06891a8599950ff8e1b61b)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

block/sheepdog.c

@@ -489,6 +489,7 @@ static int connect_to_sdog(const char *addr, const char *port)
             if (errno == EINTR) {
                 goto reconnect;
             }
+            close(fd);
             break;
         }