fixed sqlstate for ER_WRONG_INDEX_NAME

removed unnesessary code from create.test


include/sql_state.h:
  added sqlstate for ER_WRONG_INDEX_NAME
mysql-test/r/create.result:
  changed sqlstate for ER_WRONG_INDEX_NAME
  remove unnesesary warning
mysql-test/t/create.test:
  remove unnesessary drop table

include/sql_state.h

@@ -159,3 +159,4 @@ ER_WARN_TOO_MANY_RECORDS,	"01000", "",
 ER_WARN_NULL_TO_NOTNULL,	"01000", "",
 ER_WARN_DATA_OUT_OF_RANGE,	"01000", "",
 ER_WARN_DATA_TRUNCATED,		"01000", "",
+ER_WRONG_INDEX_NAME,            "42000", "",

mysql-test/r/create.result

@@ -70,10 +70,7 @@ ERROR 42000: Incorrect table name ''
 create table t1 (`` int);
 ERROR 42000: Incorrect column name ''
 create table t1 (i int, index `` (i));
-ERROR HY000: Incorrect index name ''
-drop table if exists t1;
-Warnings:
-Note	1051	Unknown table 't1'
+ERROR 42000: Incorrect index name ''
 create table t1 (a int auto_increment not null primary key, B CHAR(20));
 insert into t1 (b) values ("hello"),("my"),("world");
 create table t2 (key (b)) select * from t1;

mysql-test/t/create.test

@@ -74,7 +74,6 @@ drop table if exists ``;
 create table t1 (`` int);
 --error 1279
 create table t1 (i int, index `` (i)); 
-drop table if exists t1;
 
 #
 # Test of CREATE ... SELECT with indexes