From: Ben Fennema <bfennema@falcon.csc.calpoly.edu>

The problem occured when files were stored on the disc in 16-bit per
character mode when all the upper bits were 0.  The fs module
converted the file name given by the user to a 8-bit per character
string to compare, so the comparison always failed.

The patch maps the file from disc into the current locale and then
compares it directly to the file name given by the user.