Fix for countable error in PHP 7.2 in find()

[starfishpatkhoo]

1. $args is always an array from func_get_args()

2. static::find_by_pk() expects $args to be an array

So why are we trying to change $args from an array into a ... non-array?

This fixes the countable error in PHP 7.2 #588 #596

[ysc2015]

To fix this error i just commented the code :

//find by pk
elseif (1 === count($args) && 1 == $num_args)
	$args = $args[0];