Some more memory improvements

* Less leaks
* Less allocations

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>

src/xmpp/presence.c

@@ -936,7 +936,7 @@ _send_presence_stanza(xmpp_stanza_t* const stanza)
     if (plugin_text) {
         xmpp_send_raw_string(conn, "%s", plugin_text);
     } else {
-        xmpp_send_raw_string(conn, "%s", text);
+        xmpp_send_raw(conn, text, text_size);
     }
     xmpp_free(connection_get_ctx(), text);
 }