wm: dnsparser

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dnsparser.c: minor changes

--- a/dnsparser.c

+++ b/dnsparser.c

@@ -600,7 +600,7 @@

 		head += 2; /* there is a dns-over-tcp len field we ignore */

 	}

 	else

-		err(1, "unknown proto: %d", p.proto);

+		err(1, "dns_reader(): unknown proto: %d", p.proto);

 	if(debug)

 	{

@@ -634,7 +634,7 @@

 main(int argc, char **argv)

 {

 	if(argc != 2)

-		err(1, "not enough arguments");

+		err(1, "%s: usage: %s file.pcap", argv[0], argv[0]);

 	pcap_init(PCAP_CHAR_ENC_LOCAL, errbuf);

 	handle = pcap_open_offline(argv[1], errbuf);