transform_values: test for empty frozen hash
transform_values: test for empty frozen hash

sgarciac/spec,eregon/rubyspec,sgarciac/spec,ruby/rubyspec,nobu/rubyspec,ruby/spec,ruby/spec,ruby/spec,eregon/rubyspec,nobu/rubyspec,sgarciac/spec,eregon/rubyspec,nobu/rubyspec,ruby/rubyspec