Fixed error output when $debug_log is enabled: pipes don't like 'a' mode,
at least they don't work this way under Windows.


git-svn-id: http://svn.resourcespace.org/svn/resourcespace@4437 c08608d7-6e46-0410-86ca-f2a6f1370df5
Initial commit
Merge branch 'master' of github.com:rzamana/resourcespace