Bugfix: recent list of includes between each file

The one time I don't get lazy and initialize my variables...

app/Engine/Engine.php

@@ -62,6 +62,7 @@ class Engine
 			if (!isset($documents[$files[$i]]))
 			{
 				$documents[$files[$i]] = $document = $this->unserialize->unserialize(file_get_contents($file_helper->resolve($files[$i])));
+				$includes = [];
 				try
 				{
 					$includes = $document->getMeta('stack');