merge

mysql-test/r/subselect.result:
  correct result after merging with fixed Item_in_optimiser::fix_left()
mysql-test/t/subselect.test:
  error code changed

mysql-test/r/subselect.result

@@ -1350,4 +1350,5 @@ INSERT INTO t1 VALUES ('z','?');
 select * from t1 where s1 > (select max(s2) from t1);
 ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '>'
 select * from t1 where s1 > any (select max(s2) from t1);
+ERROR HY000: Illegal mix of collations (latin1_german1_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '>'
 drop table t1;

mysql-test/t/subselect.test

@@ -907,8 +907,8 @@ drop table t1,t2;
 CREATE TABLE t1 (s1 CHAR(5) COLLATE latin1_german1_ci,
                  s2 CHAR(5) COLLATE latin1_swedish_ci);
 INSERT INTO t1 VALUES ('z','?');
--- error 1265
+-- error 1266
 select * from t1 where s1 > (select max(s2) from t1);
--- error 1265
+-- error 1266
 select * from t1 where s1 > any (select max(s2) from t1);
 drop table t1;