enabling HA_READ_PREFIX_LAST_OR_PREV

mysql-test/t/subselect.test:
  fixed test case for no InnoDB

mysql-test/t/subselect.test

@@ -781,6 +781,7 @@ drop table if exists t1;
 #
 # key field overflow test
 #
+--disable_warnings
 CREATE TABLE t1
 (
 FOLDERID VARCHAR(32)BINARY NOT NULL
@@ -798,6 +799,7 @@ FOLDERID VARCHAR(32)BINARY NOT NULL
 
 , PRIMARY KEY ( FOLDERID )
 ) TYPE=InnoDB;
+--enable_warnings
 CREATE INDEX FFOLDERID_IDX ON t1 (FOLDERID);
 CREATE INDEX CMFLDRPARNT_IDX ON t1 (PARENTID);
 INSERT INTO t1 VALUES("0c9aab05b15048c59bc35c8461507deb", "System", "System", "2003-06-05 16:30:00", "The system content repository folder.", "3", "2003-06-05 16:30:00", "System", "0", NULL, "9c9aab05b15048c59bc35c8461507deb", "1");

sql/opt_range.cc

@@ -2637,7 +2637,7 @@ int QUICK_SELECT_DESC::get_next()
     else
     {
       DBUG_ASSERT(range->flag & NEAR_MAX || range_reads_after_key(range));
-#ifdef NOT_IMPLEMENTED_YET
+#ifndef NOT_IMPLEMENTED_YET
       result=file->index_read(record, (byte*) range->max_key,
 			      range->max_length,
 			      ((range->flag & NEAR_MAX) ?