Log Message:
Update to 1.0.4:

1.0.4 (20 Dec 06)
~~~~~~~~~~~~~~~~~
Fixes some minor bugs since the last version, 1.0.3.

* Fix file permissions race problem (CAN-2005-0953).

* Avoid possible segfault in BZ2_bzclose.  From Coverity's NetBSD
  scan.

* 'const'/prototype cleanups in the C code.

* Change default install location to /usr/local, and handle multiple
  'make install's without error.

* Sanitise file names more carefully in bzgrep.  Fixes CAN-2005-0758
  to the extent that applies to bzgrep.

* Use 'mktemp' rather than 'tempfile' in bzdiff.

* Tighten up a couple of assertions in blocksort.c following automated
  analysis.

* Fix minor doc/comment bugs.