EllisLab/CodeIgniter — pull request #2242 by WDC (2013-02-13 16:50:58+00:00)
Title: Return array of all data with set_value()

This allows for the user to send a `NULL` value to `set_value()` and get an array of all the data validated by the `Form_validation`.

This mirrors what can be done with `$this->input->post(NULL);`