From 19a7fb5df5ec3445201ce5fbe475a08faf6319fc Mon Sep 17 00:00:00 2001
From: Mark Haines <mjark@negativecurvature.net>
Date: Wed, 25 May 2016 15:00:05 +0100
Subject: Fix an integer wrap around bug and add a couple more tests

---
 src/megolm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/megolm.c')

diff --git a/src/megolm.c b/src/megolm.c
index a969b36..affd3cb 100644
--- a/src/megolm.c
+++ b/src/megolm.c
@@ -116,7 +116,11 @@ void megolm_advance_to(Megolm *megolm, uint32_t advance_to) {
             ((advance_to >> shift) - (megolm->counter >> shift)) & 0xff;
 
         if (steps == 0) {
-            continue;
+            if (advance_to < megolm->counter) {
+                steps = 0x100;
+            } else {
+                continue;
+            }
         }
 
         /* for all but the last step, we can just bump R(j) without regard
-- 
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