PHP Notice: Only variables should be passed by reference, catalog extra_functions\superglobals.php

[torvista]

Using Report All Errors, this gets flagged:
superglobals_format(get_defined_constants(), false, true);

I changed it to

$defined_constants = get_defined_constants();
superglobals_format($defined_constants, false, true);

and it has stopped complaining. There is a second, similar instance too, below.