Get rid of apr_int64_t format string check in swig py configure.
This check relied on APR implementation details and broke with APR 1.7.0. Rather than trying to guess a perfect format string to use, just use the largest possible format and cast the argument accordingly.
Should fix build against APR 1.7.0 and later.
Suggested by: brane
* build/ac-macros/swig.m4: Remove code related to SVN_APR_INT64_T_PYCFMT.
* subversion/bindings/swig/python/libsvn_swig_py/swigutil_py.c (svn_swig_py_client_blame_receiver_func): Stop relying on the SVN_APR_INT64_T_PYCFMT constant from configure. Use "L" and acast to PY_LONG_LONG instead.
swig-py: Followup to r1848577, simplifying svn_stream_t pointer handling.
* subversion/bindings/swig/python/libsvn_swig_py/swigutil_py.c (svn_swig_py_make_stream): Use svn_swig_py_convert_ptr() rather than manually checking for an instance of libsvn.core.svn_stream_t using Python APIs.