mysql-test/r/group_by.result:
  After merge fix
  (Put test in same order as in 4.1)
mysql-test/t/group_by.test:
  After merge fix
  (Put test in same order as in 4.1)
sql/item_cmpfunc.cc:
  After merge fix (+ simple fix to not allow compiler to do tail optimization)
sql/item_cmpfunc.h:
  After merge fix