* test/ruby/test_settracefunc.rb: rewrite tests with
  assert_consistent_call_return().
  assert_consistent_call_return() is also modified to check
  consistency.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46472 b2dd03c8-39d4-4d8f-98ff-823fe69b080e