Don't fail to classify stand-alone chat states

Ignore XEP-0359 elements when checking whether a stanza has non-XEP-0085
content.  This allows mod_client_state to filter chat states with an
<origin-id/> element.

src/misc.erl

@@ -195,7 +195,11 @@ get_mucsub_event_type(_Packet) ->
 is_standalone_chat_state(Stanza) ->
     case unwrap_carbon(Stanza) of
 	#message{body = [], subject = [], sub_els = Els} ->
-	    IgnoreNS = [?NS_CHATSTATES, ?NS_DELAY, ?NS_EVENT, ?NS_HINTS],
+	    IgnoreNS = [?NS_CHATSTATES,
+			?NS_DELAY,
+			?NS_EVENT,
+			?NS_HINTS,
+			?NS_SID_0],
 	    Stripped = [El || El <- Els,
 			      not lists:member(xmpp:get_ns(El), IgnoreNS)],
 	    Stripped == [];