[PATCH 3/4] cache.h: hex2chr() - avoid -Wsign-compare warnings

[Ramsay Jones <ramsay@xxxxxxxxxxxxxxxxxxxx>]

Signed-off-by: Ramsay Jones <ramsay@xxxxxxxxxxxxxxxxxxxx>
---
 cache.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cache.h b/cache.h
index a916bc79e..a0e3e362c 100644
--- a/cache.h
+++ b/cache.h
@@ -1243,8 +1243,8 @@ static inline unsigned int hexval(unsigned char c)
  */
 static inline int hex2chr(const char *s)
 {
-	int val = hexval(s[0]);
-	return (val < 0) ? val : (val << 4) | hexval(s[1]);
+	unsigned int val = hexval(s[0]);
+	return (val & ~0xf) ? val : (val << 4) | hexval(s[1]);
 }
 
 /* Convert to/from hex/sha1 representation */
-- 
2.14.0