From db9cc960fc1fec9075fb455c617a2e0cdd7c6fb2 Mon Sep 17 00:00:00 2001
From: Lode <lvandeve@gmail.com>
Date: Tue, 3 May 2016 23:07:29 +0200
Subject: fix relying on integer underflow

---
 lodepng.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lodepng.cpp b/lodepng.cpp
index fcad93e..8c78758 100644
--- a/lodepng.cpp
+++ b/lodepng.cpp
@@ -2385,9 +2385,10 @@ static unsigned readBitsFromReversedStream(size_t* bitpointer, const unsigned ch
 {
   unsigned result = 0;
   size_t i;
-  for(i = nbits - 1; i < nbits; --i)
+  for(i = 0 ; i < nbits; ++i)
   {
-    result += (unsigned)readBitFromReversedStream(bitpointer, bitstream) << i;
+    result <<= 1;
+    result |= (unsigned)readBitFromReversedStream(bitpointer, bitstream);
   }
   return result;
 }
-- 
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