* simpler handling of moves from a smaller to a larger cgsize in
  tcg8086.a_load_reg_ref, which additionally fixes the following issues:
  o The higher parts of the source register is no longer modified.
  o The source register's size is no longer modified with makeregsize.
  o Conversion from OS_S8 to a larger size is now supported.



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26335 3ad0048d-3df7-0310-abae-a5850022a9f2