SET column storing procedure has been modified to be 64bit-clean.


mysql-test/r/type_set.result:
  Added test case for bug#15409.
mysql-test/t/type_set.test:
  Added test case for bug#15409.
sql/field.cc:
  Fixed bug#15409.
  The Field_set::store(longlong nr,...) method incompletely
  calculates a bit mask for the comparison with a given number:
  if that number is greater than 0x7F00 0000 0000 0000 (LONGLONG_MAX),
  it uses zero bit mask instead of 0xFFFF FFFF FFFF FFFF (ULONGLONG_MAX).
  
  Incomplete expression has been replaced with a set_bits macro call.