fix real_value_type hashing

[Ulrich Weigand]

David Edelsohn wrote:

>The patch fixes the compare bootstrap failure on AIX.  Now we'll
>see what the testresults hold.

Same here: both s390-ibm-linux and s390x-ibm-linux now
bootstrap again and pass the test suite without new regressions.

Thanks,
Ulrich


--
  Dr. Ulrich Weigand
  Linux for S/390 Design & Development
  IBM Deutschland Entwicklung GmbH, Schoenaicher Str. 220, 71032 Boeblingen
  Phone: +49-7031/16-3727   ---   Email: Ulrich.Weigand@de.ibm.com