sortByCharacter parameter filtered out from API request

sortByCharacter parameter is not taken into account anymore in REST API contact/get

This parameter is filtered out in api/v3/utils.php around line 438

It seems this can be solved by adding the following two lines in api/v3/utils.php

@@ -417,4 +417,6 @@
// we need to add this in as earlier in this function 'id' was unset in favour of $entity_id
$fields['values'][$entity . '_id'] = array();
+ // we need to add this to prevent stripping of this parameter
+ $fields['values']['sortByCharacter'] = '';
$varsToFilter = array('returnProperties', 'inputParams');
foreach ($varsToFilter as $varToFilter){

I don't know if this is the prefered way to patch.