Add a couple of argument assertions.
Add a couple of argument assertions.

* subversion/libsvn_wc/adm_ops.c
  (svn_wc__process_committed_internal, svn_wc_queue_committed3): Assert that
    neither checksum is given or both checksums are given.

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