refactor(media-files): update code according to coding doctrine coding standard

src/flextype/Foundation/Media/MediaFiles.php

@@ -108,7 +108,7 @@ class MediaFiles
                                 try {
                                     // Get the width and height from the uploaded image
                                     [$width, $height] = getimagesize($file['tmp_name']);
-                                } catch (ErrorException $e) {
+                                } catch (\ErrorException $e) {
                                     // Ignore read errors
                                 }