import fix clobberred dn fix.

servers/slapd/back-ldbm/dn2id.c

@@ -133,12 +133,15 @@ dn2id_delete(
 		return( -1 );
 	}
 
+	dn = ch_strdup( dn );
 	dn_normalize_case( dn );
 	key.dptr = dn;
 	key.dsize = strlen( dn ) + 1;
 
 	rc = ldbm_cache_delete( db, key );
 
+	free( dn );
+
 	ldbm_cache_close( be, db );
 
 	Debug( LDAP_DEBUG_TRACE, "<= dn2id_delete %d\n", rc, 0, 0 );