Fix mathematical logic errors in traffic updates

traffic's unit is "B"
but userTraffic's unit is "MB"
they can't minus when traffic's unit is "B"
so we nned to change this line to ensure the unity of units

daemon.php

@@ -101,7 +101,7 @@ function updateTraffic($conn, $user, $traffic) {
 				mysqli_query($conn, "UPDATE `proxies` SET `status`='0' WHERE `username`='{$user}' AND `status`='2'");
 			} else {
 				// 数据库里的当日流量大于统计得到的流量，说明这一天已经过完了，将新的流量计入数据库
-				$newTraffic = round(($userTraffic - $traffic) / 1024 / 1024, 2);
+				$newTraffic = round(($userTraffic - $traffic / 1024 / 1024), 2);
 				if($newTraffic < 0) {
 					$newTraffic = 0;
 				}