Revised the fix for bug #7098.
  Corrected the method Item_string::new_item.
sql_select.cc:
  Revised the fix for bug #7098.
  Aborted the previous modifications.


sql/sql_select.cc:
  Revised the fix for bug #7098.
  Aborted the previous modifications.
sql/item.h:
  Revised the fix for bug #7098.
  Corrected the method Item_string::new_item.