Fix "printf" format specifiers in a "merge --reintegrate" error message, and remove unused variables.
Fix "printf" format specifiers in a "merge --reintegrate" error message, and
remove unused variables.

* subversion/libsvn_client/merge.c
  (calculate_left_hand_side): Remove unused variables.
  (svn_client_merge_reintegrate): Use "%ld" format spec for svn_revnum_t.

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