Fix problems pointed out by Philip Martin and Joe Orton.
Fix problems pointed out by Philip Martin and Joe Orton.

* subversion/libsvn_subr/io.c
  
  (svn_io_temp_dir): Axe caching.  Canonicalize path before returning.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion