[Issue #126] Fix implicit cast from unsigned char to int.

1 files changed, 1 insertions, 1 deletions

diff --git a/inflate.c b/inflate.c
index 1b5a554..04f827c 100644
--- a/inflate.c
+++ b/inflate.c
@@ -483,7 +483,7 @@ static int updatewindow(z_stream *strm, const unsigned char *end, uint32_t copy)
     do { \
         if (have == 0) goto inf_leave; \
         have--; \
-        hold += (*next++ << bits); \
+        hold += ((unsigned)(*next++) << bits); \
         bits += 8; \
     } while (0)