Additional fix for Bug#14255 CAST(x AS BINARY(N)) does not pad

cast.result:
cast.test:
  Avoid 0x00 byte in test results, use HEX instead.

mysql-test/r/cast.result

@@ -165,9 +165,9 @@ cast(_latin1'ab'  AS char)    as c1,
 cast(_latin1'a '  AS char)    as c2,
 cast(_latin1'abc' AS char(2)) as c3,
 cast(_latin1'a  ' AS char(2)) as c4,
-cast(_latin1'a'   AS char(2)) as c5;
+hex(cast(_latin1'a'   AS char(2))) as c5;
 c1	c2	c3	c4	c5
-ab	a 	ab	a 	a
+ab	a 	ab	a 	6100
 Warnings:
 Warning	1292	Truncated incorrect CHAR(2) value: 'abc'
 Warning	1292	Truncated incorrect CHAR(2) value: 'a  '
@@ -185,9 +185,9 @@ cast(_latin1'a'   AS char(2)) as c5;
 Warnings:
 Warning	1292	Truncated incorrect CHAR(2) value: 'abc'
 Warning	1292	Truncated incorrect CHAR(2) value: 'a  '
-select * from t1;
-c1	c2	c3	c4	c5
-ab	a 	ab	a 	a
+select c1,c2,c3,c4,hex(c5) from t1;
+c1	c2	c3	c4	hex(c5)
+ab	a 	ab	a 	6100
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (

mysql-test/t/cast.test

@@ -64,7 +64,7 @@ select
   cast(_latin1'a '  AS char)    as c2,
   cast(_latin1'abc' AS char(2)) as c3,
   cast(_latin1'a  ' AS char(2)) as c4,
-  cast(_latin1'a'   AS char(2)) as c5;
+  hex(cast(_latin1'a'   AS char(2))) as c5;
 select cast(1000 as CHAR(3));
 
 create table t1 select
@@ -73,7 +73,7 @@ create table t1 select
   cast(_latin1'abc' AS char(2)) as c3,
   cast(_latin1'a  ' AS char(2)) as c4,
   cast(_latin1'a'   AS char(2)) as c5;
-select * from t1;
+select c1,c2,c3,c4,hex(c5) from t1;
 show create table t1;
 drop table t1;