Fixed #1325: signature fix pjmedia objects

git-svn-id: https://svn.pjsip.org/repos/pjproject/branches/projects/2.0-dev@3640 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip-apps/src/samples/playsine.c b/pjsip-apps/src/samples/playsine.c
index c2fb646..ce9fa3f 100644
--- a/pjsip-apps/src/samples/playsine.c
+++ b/pjsip-apps/src/samples/playsine.c
@@ -138,7 +138,7 @@
     /* Fill in port info. */
     name = pj_str("sine generator");
     pjmedia_port_info_init(&port->info, &name,
-			   PJMEDIA_PORT_SIGNATURE('s', 'i', 'n', 'e'),
+                           PJMEDIA_SIG_CLASS_PORT_AUD('s', 'i'),
 			   sampling_rate,
 			   channel_count,
 			   16, sampling_rate * 20 / 1000 * channel_count);