From a0ea2d5745431c560ed89f523e0b03c0069d49b7 Mon Sep 17 00:00:00 2001
From: Markus Zolliker <markus.zolliker@psi.ch>
Date: Wed, 29 Oct 2014 15:59:12 +0100
Subject: [PATCH] bug fix in syncedprot.c (treat stackoverflow correctly)

---
 syncedprot.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/syncedprot.c b/syncedprot.c
index 7d6a87b2..5d5b5aa1 100644
--- a/syncedprot.c
+++ b/syncedprot.c
@@ -163,10 +163,10 @@ long SyncedBegin(long syncid)
       return SYNCED_NO_MEMORY;
     }
   }
-  sp++;
   if (sp >= NSTACK) {
     return SYNCED_STACK_OVERFLOW;
   }
+  sp++;
   sync->count++;
   actualSync = sync;
   return sync->id;
@@ -181,13 +181,13 @@ long SyncedEnd(long syncid)
   if (sp <= 0) {
     return SYNCED_STACK_UNDERFLOW;
   }
-  sync = actualSync;
   sp--;
+  sync = actualSync;
   actualSync = stack[sp];
-  sync->count--;
-  if (sync->count < 0) {
+  if (sync->count <= 0) {
     return SYNCED_COUNT_UNDERFLOW;
   }
+  sync->count--;
   if (syncid != 0 && syncid != sync->id) {
     return SYNCED_ID_MISMATCH;
   }