From a98391b976ba7dd544af6a0d16b324efb2fc7a3c Mon Sep 17 00:00:00 2001
From: Georg Ehrke <georg@ownCloud.com>
Date: Wed, 26 Jun 2013 10:57:37 +0200
Subject: [PATCH] some minor improvements to preview lib

---
 lib/preview.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/preview.php b/lib/preview.php
index 3564fe3df4..87e2e78d1d 100755
--- a/lib/preview.php
+++ b/lib/preview.php
@@ -323,7 +323,7 @@ class Preview {
 		}else{
 			$mimetype = $this->fileview->getMimeType($file);
 
-			$preview;
+			$preview = null;
 
 			foreach(self::$providers as $supportedmimetype => $provider) {
 				if(!preg_match($supportedmimetype, $mimetype)) {
@@ -350,6 +350,11 @@ class Preview {
 
 				break;
 			}
+
+			if(is_null($preview) || $preview === false) {
+				$preview = new \OC_Image();
+			}
+
 			$this->preview = $preview;
 		}
 		$this->resizeAndCrop();