[PATCH] Fix python bindings for svn.wc.get_prop_diffs()

Hi,

The attached patch fixes the python bindings for
svn.wc.get_prop_diffs(). Patch against trunk.

[[[
Fix Python bindings for svn.wc.get_prop_diffs().

* subversion/bindings/swig/include/svn_containers.swg:
  Add Python typemap for apr_array_header_t * of svn_prop_t *.

* subversion/bindings/swig/python/libsvn_swig_py/swigutil_py.c
  (svn_swig_py_proparray_to_dict): Rename from proparray_to_dict and
make public.

* subversion/bindings/swig/python/libsvn_swig_py/swigutil_py.h
  (svn_swig_py_proparray_to_dict): Add public prototype.
  
* subversion/bindings/swig/python/tests/wc.py
  (test_get_prop_diffs): Add unit test for svn.wc.get_prop_diffs()

]]]

Please comment if there's any particular reason this patch can't go into
trunk as-is.

Cheers,

Jelmer