plugin XEP-0054: use .jpg instead of .jpe for jpeg files

src/plugins/plugin_xep_0054.py

@@ -226,6 +226,8 @@ class XEP_0054(object):
 
             ext = mimetypes.guess_extension(mime_type, strict=False)
             assert ext is not None
+            if ext == u'.jpe':
+                ext = u'.jpg'
             log.debug(u'photo of type {type} with extension {ext} found [{jid}]'.format(
                     type=mime_type, ext=ext, jid=entity_jid.full()))
         try: