Fix for bug#5323, no bug, new error code

mysql-test/r/ndb_alter_table.result

@@ -179,7 +179,7 @@ a	b	c
 2	two	two
 alter table t1 drop index c;
 select * from t1 where b = 'two';
-ERROR HY000: Can't lock file (errno: 241)
+ERROR HY000: Can't lock file (errno: 159)
 select * from t1 where b = 'two';
 a	b	c
 2	two	two

mysql-test/t/disabled.def

@@ -15,6 +15,5 @@ rpl_relayrotate : Unstable test case, bug#12429
 rpl_until       : Unstable test case, bug#12429
 rpl_deadlock    : Unstable test case, bug#12429
 kill            : Unstable test case, bug#9712
-ndb_alter_table : Bug #15323
 ndb_cache2      : Bug #15004
 ndb_cache_multi2: Bug #15004