imagecopy float implicit conversion warning

[marco-pm]

$startwidth = (int)($this->canvas['width'] - $newwidth) / 2;
$startheight = (int)($this->canvas['height'] - $newheight) / 2;

[...]

imagecopy($newimg, $tmpimg, $startwidth, $startheight, 0, 0, $newwidth, $newheight);

On PHP 8.1+, if $startwidth or $startheight are float, imagecopy generates a Implicit conversion from float to int loses precision warning.