added set credit to zero option

_include/include_set_credit_to_zero.php

@@ -0,0 +1,14 @@
+<?php
+
+# HITELALKALOM NULLÁZÁS
+
+if ($this->is_id()) {
+    $sql->update_table("user_kid", array(
+            "uk_credit" => 0,
+        ), array(
+            "uk_id" => $this->get_id(),
+        ));
+
+    header("Location: /admin/members/{$this->get_id()}");
+}
+?>