Cleanup GCC4 warnings about signedness.
diff --git a/ip/ipmaddr.c b/ip/ipmaddr.c
index 1cdab0b..e6bd625 100644
--- a/ip/ipmaddr.c
+++ b/ip/ipmaddr.c
@@ -298,7 +298,8 @@
 				usage();
 			if (ifr.ifr_hwaddr.sa_data[0])
 				duparg("address", *argv);
-			if (ll_addr_a2n(ifr.ifr_hwaddr.sa_data, 14, *argv) < 0) {
+			if (ll_addr_a2n(ifr.ifr_hwaddr.sa_data, 
+					14, *argv) < 0) {
 				fprintf(stderr, "Error: \"%s\" is not a legal ll address.\n", *argv);
 				exit(1);
 			}