Only variables should be passed by reference in date_make_date() line 866 date_api.module

In line 866 of the date_api.module we are passing an array directly to a function that requires a variable passed by reference, not a naked array.

We need to change this:
$max_granularity = end(date_granularity_sorted($granularity));

to this

  $sorted_granularity = date_granularity_sorted($granularity)
  $max_granularity = end($sorted_granularity);