From 530a4ccdce8e72abd13a9b886b9da39c604ed0be Mon Sep 17 00:00:00 2001
From: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Date: Tue, 13 Nov 2018 20:35:53 +0100
Subject: [PATCH] Fix return value of sys_arch_mbox_tryfetch() in Win32 port

It should be SYS_MBOX_EMPTY, not SYS_ARCH_TIMEOUT.
SYS_MBOX_EMPTY is defined to SYS_ARCH_TIMEOUT, so there is no bug.
But for good readability of the code,  SYS_MBOX_EMPTY should be used.
---
 contrib/ports/win32/sys_arch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contrib/ports/win32/sys_arch.c b/contrib/ports/win32/sys_arch.c
index 2f261dc7..9643ff19 100644
--- a/contrib/ports/win32/sys_arch.c
+++ b/contrib/ports/win32/sys_arch.c
@@ -688,7 +688,7 @@ sys_arch_mbox_tryfetch(sys_mbox_t *q, void **msg)
       *msg  = NULL;
     }
 
-    return SYS_ARCH_TIMEOUT;
+    return SYS_MBOX_EMPTY;
   }
 }