Pull Request for Issue # .

Summary of Changes

When inheriting the model from within a custom component the inherited model FinderModelSearch when populating its state requires its components parameters. To fetch them it utilises JApplication::getParams(). However, if that model is inherited by a custom components model, which overrides populateState like so

protected function populateState($ordering = null, $direction = null)
{
   // Call parent for initial setup.
   parent::populateState($ordering, $direction);

   ...
}

then the context used by JApplication::getParams() is that of the custom component and the parameters returned are not those of com_finder. For that reason JApplication::getParams() must be passed the component name and correctly be JApplication::getParams('com_finder').

Testing Instructions

1. From within any other component that is not com_finder create a model class that extends FinderModelSearch.
2. In the inheriting model override populateState as described above.
3. In your custom component create a view that inherits FinderViewSearch and override its display method the same way we override the model's populateState - just call parent::display($tpl) in there. This will call the parent view's display method where the model is called to return some data. That call will trigger the populateState method using the context of the custom component thus returning the wrong parameters.
4. Create two menu items - one using com_finder's search view and another one using your component's search view, which inherits com_finder's view. Then open every view in the browser.
5. In FinderModelSearch::populateState just var_dump() the parameters to see what is returned.
   Do it one time using the original code $params = $app->getParams().
   Then change the code to $params = $app->getParams('com_finder') and reload.