Fix bug introduced in r29009

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@29091 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Image.py

@@ -353,10 +353,10 @@ class Image(File, OFSImage):
         mime, image = self._makeDisplayPhoto(display, format=format, quality=quality,
                                              resolution=resolution, frame=frame,
                                              image_size=image_size)
-        self.setConversion(image, mime, format=format, quality=quality,
+        self.setConversion(image.data, mime, format=format, quality=quality,
                            resolution=resolution, frame=frame,
                            image_size=image_size)
-        return mime, image
+        return mime, image.data
     return self.getContentType(), self.getData()
 
   security.declareProtected(Permissions.View, 'getSearchableText')