Can't pass empty string by reference to PLG_itemPreSave()

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Can't pass empty string by reference to PLG_itemPreSave() #396

Closed leegarner closed 4 years ago

leegarner commented 4 years ago

Unintended consequence of passing by reference, literals aren't supported. The call in lib-users.php is the only one I found that passes a literal to PLG_itemPreSave()