[IPX]: Fix typo, ipxhdr() --> ipx_hdr()

Noticed by Dave Jones.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c
index 40196420..bef3f61 100644
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -1645,7 +1645,7 @@
 	if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
 		goto drop;
 
-	ipx_pktsize = ntohs(ipxhdr(skb)->ipx_pktsize);
+	ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
 	
 	/* Too small or invalid header? */
 	if (ipx_pktsize < sizeof(struct ipxhdr) ||