Post review fixes

sql/sql_table.cc

@@ -3773,8 +3773,6 @@ static uint compare_tables(TABLE *table, List<create_field> *create_list,
     index_drop_buffer[(*index_drop_count)++]= table_key - table->key_info;
     index_add_buffer[(*index_add_count)++]= new_key - key_info_buffer;
     field= table->field[new_key->key_part->fieldnr];
-    // Add field to the key
-    new_key->key_part->field= table->field[new_key->key_part->fieldnr];
     // Mark field to be part of new key 
     field->add_index= 1;
     DBUG_PRINT("info", ("index changed: '%s'", table_key->name));
@@ -3797,8 +3795,6 @@ static uint compare_tables(TABLE *table, List<create_field> *create_list,
       /* Key not found. Add the offset of the key to the add buffer. */
       index_add_buffer[(*index_add_count)++]= new_key - key_info_buffer;
       field= table->field[new_key->key_part->fieldnr];
-    // Add field to the key
-    new_key->key_part->field= table->field[new_key->key_part->fieldnr];
       // Mark field to be part of new key 
       field->add_index= 1;
       DBUG_PRINT("info", ("index added: '%s'", new_key->name));