Forward port r123 from branches/5.0:

Replace goto in os_event_wait with a normal loop.

os/os0sync.c

@@ -317,7 +317,8 @@ os_event_wait(
 	os_fast_mutex_lock(&(event->os_mutex));
 
 	old_signal_count = event->signal_count;
-loop:
+
+	for (;;) {
 		if (event->is_set == TRUE
 			|| event->signal_count != old_signal_count) {
 
@@ -334,11 +335,10 @@ loop:
 
 		pthread_cond_wait(&(event->cond_var), &(event->os_mutex));
 
-	/* Solaris manual said that spurious wakeups may occur: we have to
-	check if the event really has been signaled after we came here to
-	wait */
-
-	goto loop;
+		/* Solaris manual said that spurious wakeups may occur: we
+		have to check if the event really has been signaled after
+		we came here to wait */
+	}
 #endif
 }