records if prepared statements is used" (see comments to 
the changed files).


mysql-test/r/ps.result:
  Post-merge fix for Bug#9096: test results fixed.
mysql-test/r/type_datetime.result:
  Post-merge fix for Bug#9096: now we do better constants comparison,
  so the optimizer is able to guess from the index that we don't
  need to evaluate WHERE clause.
sql/item.cc:
  Post-merge fixes for Bug#9096: implement by-value comparison for
  new 5.0 DECIMAL type.
  Item_real is renamed to Item_float in 5.0
  Item_varbinary is renamed to Item_hex_string in 5.0
sql/item.h:
  Post-merge fixes for Bug#9096: declaration for Item_decimal::eq