dns.c: fix input validation fix

Thanks to Guido Vranken <guido@guidovranken.com> for pointing out I'd
forgotten to de-ref a pointer in the previous fix.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/dns.c b/dns.c
index c64f3b1..1d3362f 100644
--- a/dns.c
+++ b/dns.c
@@ -318,7 +318,7 @@ static int parse_answer(struct interface *iface, struct sockaddr *from,
 	struct dns_answer *a;
 	uint8_t *rdata;
 
-	if (!name || rlen < 0) {
+	if (!name || *rlen < 0) {
 		fprintf(stderr, "dropping: bad question\n");
 		return -1;
 	}