From 1f8a19a7539217485613d9396a84dcc755f753b9 Mon Sep 17 00:00:00 2001
From: Isis Lovecruft <isis@patternsinthevoid.net>
Date: Tue, 7 Jan 2020 08:04:45 +0000
Subject: [PATCH] Fix an attempted overflow on absolute value computation for
 radix-256 tables.

Found by the fuzzer in 4f5d2d4.
---
 src/window.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/window.rs b/src/window.rs
index 4afe63e..adedac9 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -53,8 +53,8 @@ where
         debug_assert!(x as i16 <= $size as i16); // XXX We have to convert to i16s here for the radix-256 case.. this is wrong.
 
         // Compute xabs = |x|
-        let xmask = x >> 7;
-        let xabs = (x + xmask) ^ xmask;
+        let xmask = x  as i16 >> 7;
+        let xabs = (x as i16 + xmask) ^ xmask;
 
         // Set t = 0 * P = identity
         let mut t = T::identity();