Adjusts $xmr_live_price - $rate_cookie comparison

This adjusts the comparison in favor of the merchant

monero/include/monero_payments.php

@@ -165,7 +165,7 @@ public function changeto($amount, $currency)
 							{
 								$rate_cookie = $_COOKIE['rate'];
 								$xmr_live_price = $this->retriveprice($currency);
-								if($xmr_live_price - $rate_cookie >= 1) //reset rate if there is a difference of 1 EURO/DOLLAR/ETC between the live rate and the cookie rate
+								if($xmr_live_price - $rate_cookie >= 1 || $xmr_live_price - $rate_cookie >= -1) //reset rate if there is a difference of 1 EURO/DOLLAR/ETC between the live rate and the cookie rate
 								{										//this is so that the merchant does not lose money from exchange market forces or cookie tampering
 									$new_amount     = $amount / $rate_cookie;
 									$rounded_amount = round($new_amount, 12);