Our ctype calls should always use unsigned.

1 files changed, 3 insertions, 1 deletions

diff --git a/net.c b/net.c
index 2c122856..e692b49b 100644
--- a/net.c
+++ b/net.c
@@ -154,7 +154,9 @@ hwaddr_aton(unsigned char *buffer, const char *addr)
 			return 0;
 		}
 		/* Ensure that digits are hex */
-		if (isxdigit ((int)c[0]) == 0 || isxdigit((int)c[1]) == 0) {
+		if (isxdigit((unsigned)c[0]) == 0 ||
+		    isxdigit((unsigned)c[1]) == 0)
+		{
 			errno = EINVAL;
 			return 0;
 		}