$this->input->cookie() does not take into account cookie prefix from config.php

[eluser]ptrippett[/eluser]
Version 1.7

When a Cookie prefix has been set in the config.php file $this->input->cookie() does not take this into account when retrieving cookie from the Cookie globa array.

Does not work:

Code:

$value = get_cookie('myvar');
if (strlen($value) == 0) {
      $value = 'Some Value';
      set_cookie('myvar', $value, 31556926, '.mydomain.com', '/', '');
}

Works:

Code:

$value = get_cookie('myprefixfromconfig_myvar');
if (strlen($value) == 0) {
      $value = 'Some Value';
      set_cookie('myvar', $value, 31556926, '.mydomain.com', '/', '');
}

Is this by design or a bug?