lint: Fix a few undefined items

include/class.client.php

@@ -247,7 +247,7 @@ class  EndUser extends BaseAuthenticatedUser {
         return $this->getNumTickets($forMyOrg, 'open') ?: 0;
     }
 
-    function getNumClosedTickets() {
+    function getNumClosedTickets($forMyOrg=false) {
         return $this->getNumTickets($forMyOrg, 'closed') ?: 0;
     }
 

setup/test/tests/stubs.php

@@ -128,6 +128,7 @@ class IntlBreakIterator {
 class SqlFunction {
     static function NOW() {}
     static function COALESCE() {}
+    static function DATEDIFF() {}
 }
 
 class SqlExpression {