Extend autoping timer on each stanza we receive.

Sometimes the server is too busy sending other stanzas or our connection is
saturated because of something else, so the pong arrives too late.
Prevent the autoping disconnect event by extending the timeout
each time a stanza is received.

Signed-off-by: Steffen Jaeckel <jaeckel-floss@eyet-services.de>

src/xmpp/message.c

@@ -153,6 +153,7 @@ static int
 _message_handler(xmpp_conn_t* const conn, xmpp_stanza_t* const stanza, void* const userdata)
 {
     log_debug("Message stanza handler fired");
+    autoping_timer_extend();
 
     if (_handled_by_plugin(stanza)) {
         return 1;