windows fixes for priority - needs to be revisited when apr and pthread versions support calls.

libs/sofia-sip/libsofia-sip-ua/su/su_pthread_port.c

@@ -268,7 +268,10 @@ int su_pthreaded_port_start(su_port_create_f *create,
 
   pthread_mutex_lock(arg.mutex);
   if (pthread_create(&tid, &attr, su_pthread_port_clone_main, &arg) == 0) {
+#ifndef WIN32
+	  /* this needs to be revisited when pthread for windows supports thread priority settings */
 	  pthread_setschedprio(tid, 99);
+#endif
     pthread_cond_wait(arg.cv, arg.mutex);
     thread_created = 1;
   }