Fix a const-correctness warning.
Fix a const-correctness warning.

* subversion/libsvn_client/delete.c
  (svn_client__can_delete): Add "const" on a pointer.

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