Issue #1515204 by gnucifer: Malformed destination uri in FeedsEnclosure.

plugins/FeedsParser.inc

@@ -349,7 +349,10 @@ class FeedsEnclosure extends FeedsElement {
           require_once drupal_get_path('module', 'transliteration') . '/transliteration.inc';
           $filename = transliteration_clean_filename($filename);
         }
-        $file = file_save_data($this->getContent(), "$destination/$filename");
+        if(file_uri_target($destination)) {
+          $destination .= trim($destination, '/') . '/';
+        }
+        $file = file_save_data($this->getContent(), $destination . $filename);
       }
 
       // We couldn't make sense of this enclosure, throw an exception.