odp-util: Fix another hang in NSH action parsing.

Found by libfuzzer.

Reported-by: Bhargava Shastry <bshastry@sec.t-labs.tu-berlin.de>
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Jan Scheurich <jan.scheurich@ericsson.com>

lib/odp-util.c

@@ -1867,8 +1867,8 @@ parse_odp_encap_nsh_action(const char *s, struct ofpbuf *actions)
                 }
                 encap_nsh.mdlen = mdlen + padding;
                 ofpbuf_uninit(&b);
+                continue;
             }
-            continue;
         }
 
         ret = -EINVAL;