[Done v1.5.6] PHP Warning: A non-numeric value encountered... - PHP 7 warnings

[torvista]

I have had a couple of these debug warnings with PHP 7.1. No doubt there will be more...

1) in advanced_search_result_header.php

I changed

$rate = $currencies->get_value($_SESSION['currency']);
if ($rate) {
$pfrom = $_GET['pfrom'] / $rate;
$pto = $_GET['pto'] / $rate;}

to

$rate = $currencies->get_value($_SESSION['currency']);
if ($rate) {
$pfrom = (float)$_GET['pfrom'] / $rate;//steve added float for PHP 7 warning
$pto = (float)$_GET['pto'] / $rate;//steve added float for PHP 7 warning
}

Note this was provoked by an url like this
SHOP_ROOT/index.php?main_page=advanced_search_result&keyword=asas&search_in_description=1& categories_id=&inc_subcat=1&manufacturers_id=&pfrom=&pto=&dfrom=&dto=

2) functions_taxes.php

I changed

// Calculates Tax rounding the result function
zen_calculate_tax($price, $tax = 0) {
$price = $price;
$tax = $tax;
//eof global $currencies;
return $price * $tax / 100;
}

to

// Calculates Tax rounding the result
function zen_calculate_tax($price, $tax = 0) {
$price = (float)$price; //steve added float for PHP 7 warning
$tax = (float)$tax; //steve added float for PHP 7 warning
//eof global $currencies;
return $price * $tax / 100;
}