Fix PHP notice when sending overdue notifications

ChangeLog

@@ -13,6 +13,10 @@ Improvements:
 * Show project name in task forms
 * Convert vanilla CSS to SASS
 
+Bug fixes:
+
+* Fix PHP notice when sending overdue notifications
+
 Version 1.0.32
 --------------
 

app/Notification/MailNotification.php

@@ -80,7 +80,7 @@ class MailNotification extends Base implements NotificationInterface
     {
         return sprintf(
             '[%s] %s',
-            $eventData['task']['project_name'],
+            isset($eventData['project_name']) ? $eventData['project_name'] : $eventData['task']['project_name'],
             $this->notificationModel->getTitleWithoutAuthor($eventName, $eventData)
         );
     }

tests/units/Notification/MailNotificationTest.php

@@ -58,6 +58,11 @@ class MailNotificationTest extends Base
             $this->assertNotEmpty($mailNotification->getMailContent($eventName, $eventData));
             $this->assertStringStartsWith('[test] ', $mailNotification->getMailSubject($eventName, $eventData));
         }
+
+        $this->assertStringStartsWith('[Test1, Test2] ', $mailNotification->getMailSubject(TaskModel::EVENT_OVERDUE, array(
+            'tasks' => array(array('id' => 123), array('id' => 456)),
+            'project_name' => 'Test1, Test2',
+        )));
     }
 
     public function testSendWithEmailAddress()