Flow the correct time for changed_date through the commit process. Also fix a small bug introduced in r40172 -- we need to verify REV_DATE is not NULL before converting it to an apr_time_t.
Flow the correct time for changed_date through the commit process. Also
fix a small bug introduced in r40172 -- we need to verify REV_DATE is not
NULL before converting it to an apr_time_t.

* subversion/libsvn_wc/adm_ops.c:
  (process_committed_leaf): switch REV_DATE param to NEW_DATE with a new
    type, and pass it on to wq_add_postcommit.
  (process_committed_internal): switch REV_DATE param to NEW_DATE and pass
    appropriately to sub-calls.
  (svn_wc_process_committed_queue, svn_wc_process_committed4): convert the
    REV_DATE parameter and pass to process_commited_internal.

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