Don't get stuck in an infinite loop comparing (short++ <= maxshort)

PR:		136893
Submitted by:	Aragon Gouveia - aragon at phat dot za dot net (mostly)
Approved by:	re (kib)
MFC after:	3 weeks

1 files changed, 2 insertions, 3 deletions

diff --git a/usr.sbin/ppp/nat_cmd.c b/usr.sbin/ppp/nat_cmd.c
index b4d6ad2..48f894a 100644
--- a/usr.sbin/ppp/nat_cmd.c
+++ b/usr.sbin/ppp/nat_cmd.c
@@ -175,7 +175,7 @@ nat_RedirectPort(struct cmdargs const *arg)
       return -1;
     }
 
-    while (laliasport <= haliasport) {
+    do {
       link = LibAliasRedirectPort(la, localaddr, htons(llocalport),
 				     remoteaddr, htons(lremoteport),
                                      aliasaddr, htons(laliasport),
@@ -187,10 +187,9 @@ nat_RedirectPort(struct cmdargs const *arg)
         return 1;
       }
       llocalport++;
-      laliasport++;
       if (hremoteport)
         lremoteport++;
-    }
+    } while (laliasport++ < haliasport);
 
     return 0;
   }