[PATCH] Remove warning 'format not a string literal' in libsvn_client

Hi!

Still on the lookout for something interresting. In the meantime I've
started removing some compiler warnings.

The code looks uglier but the warnings is gone. Is there any #directive
to ignore warnings for a subpart of the code? We know that those fmt
strings are safe. Perhaps we could tell the compiler that?

[[[
* subversion/libsvn_client/diff.c
  (display_prop_diffs): Remove warnings about 'format not a string
    literal'.

* subversion/libsvn_client/export.c
  (copy_one_versioned_file): Remove warnings about 'format not a string
    literal'.

Patch by: Daniel Näslund <daniel_at_longitudo.com>
]]]

/Daniel