Use long labs(3) for pointer arithmetic.

Found by David Hill with clang.

diff --git a/usr.sbin/tcpdump/print-icmp6.c b/usr.sbin/tcpdump/print-icmp6.c
index 4e8caed..5823fd4 100644 (file)
--- a/usr.sbin/tcpdump/print-icmp6.c
+++ b/usr.sbin/tcpdump/print-icmp6.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: print-icmp6.c,v 1.20 2016/05/07 19:36:45 jca Exp $    */
+/*     $OpenBSD: print-icmp6.c,v 1.21 2016/07/28 13:05:52 bluhm Exp $  */
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
@@ -452,7 +452,7 @@ icmp6_print(const u_char *bp, u_int length, const u_char *bp2)
                                        mode = FQDN;
                        }
                }
-               if (mode == UNKNOWN && 2 < abs(buf[12] - (ep - buf - 13)))
+               if (mode == UNKNOWN && 2 < labs(buf[12] - (ep - buf - 13)))
                        mode = WRU;
                if (mode == UNKNOWN)
                        mode = FQDN;