Shut up xgettext warning

po/Makevars

@@ -34,7 +34,7 @@ COPYRIGHT_HOLDER = VideoLAN
 # It can be your email address, or a mailing list address where translators
 # can write to without being subscribed, or the URL of a web page through
 # which the translators can contact you.
-MSGID_BUGS_ADDRESS =
+MSGID_BUGS_ADDRESS = vlc-devel@videolan.org
 
 # This is the list of locale categories, beyond LC_MESSAGES, for which the
 # message catalogs shall be used.  It is usually empty.