raw IP: Assign ndo_protocol in lowercases like in most similar cases
diff --git a/print-ip.c b/print-ip.c
index b4e287a..f4c5fae 100644
--- a/print-ip.c
+++ b/print-ip.c
@@ -525,7 +525,7 @@
 void
 ipN_print(netdissect_options *ndo, const u_char *bp, u_int length)
 {
-	ndo->ndo_protocol = "ipN";
+	ndo->ndo_protocol = "ipn";
 	if (length < 1) {
 		ND_PRINT("truncated-ip %u", length);
 		return;