Fix typo in previous revision.

sql/updates/4/554

@@ -12,7 +12,7 @@ sub DoUpdate($$$)
 		     "  enum('0','10','100','1000','4000','10000',".
 		     "       '40000','100000') NOT NULL default '0'");
     }
-    if (!DBSlotExists("interfaces", "fixedmode")) {
+    if (!DBSlotExists("interfaces", "noportcontrol")) {
         DBQueryFatal("alter table interfaces " .
 		     " add `noportcontrol` tinyint(1) NOT NULL default '0' ".
 		     "   after duplex");