Adjust some test code that isn't usually compiled so that it can be
compiled.

* subversion/tests/libsvn_delta/range-index-test.h
  (check_copy_count, random_range_index_test): Update for API changes.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1449105 13f79535-47bb-0310-9956-ffa450edef68