admin update

admin/control/merchant.php

@@ -169,7 +169,7 @@ class merchantControl extends SystemControl
             $update_credit_bonus = ncPriceFormat($_POST['credit_bonus']);
             $operatetype = $_POST['operatetype'];
             if ($update_credit_bonus > 0) {
-                if ($merchant['credit_bonus'] + $update_credit_bonus < 0 || $merchant['credit_bonus'] - $update_credit_bonus < 0) {
+                if ($merchant['credit_bonus'] + $update_credit_bonus < 0) {
                     showMessage('授信金额调整后不能小于0');
                 }
                 if ($operatetype == 'add') {