array_merge() has changed in PHP5, breaks process_argument_elements_by_view

From the array_merge() documentation:

Warning

The behavior of array_merge() was modified in PHP 5. Unlike PHP 4, array_merge() now only accepts parameters of type array. However, you can use typecasting to merge other types.

This causes the module to silently fail. The so-called "processed" arguments are actually deleted. The returned array from views_argument_api_process_argument_elements_by_view($view_name, $form_values) has its keys intact but its values missing. I've attached a patch which will fix the problem.