Fix condition, return original content only if format is empty and no parameters are passed.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@45090 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Image.py

@@ -269,7 +269,7 @@ class Image(TextConvertableMixin, File, OFSImage):
         data = aq_base(data)
         self.setConversion(data, mime=mime_type, format=format)
         return mime_type, data
-    if not (format and kw):
+    if not (format or kw):
       # User asked for original content
       return self.getContentType(), self.getData()
     image_size = self.getSizeFromImageDisplay(kw.get('display'))