fix a memory leak

closes #169

Change-Id: I0560aa9a4a48e39bc5d1c667362cd58c557499dd
(cherry picked from commit ed75c99a2d)

daemon/call.c

@@ -473,6 +473,7 @@ void kernelize(struct packet_stream *stream) {
 			rs = l->data;
 			reti.payload_types[reti.num_payload_types++] = rs->payload_type;
 		}
+		g_list_free(values);
 	}
 
 	kernel_add_stream(cm->conf.kernelfd, &reti, 0);