Description:
------------
If I do a array_value on an empty array, it doesn't work. It works well if there is as least 1 value in the array.

Test script:
---------------
$array[] = 'data1'; // I want [0 => 'data1']
unset($array[0]); // I want []
$array = array_values($array); // I want [] but keys resetted
$array[] = 'data2'; // I want [0 => 'data2']
$array[] = 'data3'; // I want [0 => 'data2', 1 => 'data3']
var_dump($array);


Expected result:
----------------
array(2) {
  [0]=>
  string(5) "data2"
  [1]=>
  string(5) "data3"
}

Actual result:
--------------
array(2) {
  [1]=>
  string(5) "data2"
  [2]=>
  string(5) "data3"
}