* override tcgvecnode.update_reference_reg_mul for i8086 and add code that
  preserves the reference segment (because reference_reset_base, which is
  sometimes used by the base method, kills the segment)



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27480 3ad0048d-3df7-0310-abae-a5850022a9f2