Eliminate a redundant parameter in merge code.
Eliminate a redundant parameter in merge code.

* subversion/libsvn_client/merge.c
  (find_unmerged_mergeinfo): Eliminate the 'never_synched' output, as it is
    redundant with SVN_IS_VALID_REVNUM(youngest_merged_rev).
  (calculate_left_hand_side): Adjust accordingly.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1234027 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion