[CASSINI]: Set skb->truesize properly on receive packets.

skb->truesize was not being incremented at all to
reflect the page based data added to RX SKBs.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c
index 33ac2ef..544ab0b 100644
--- a/drivers/net/cassini.c
+++ b/drivers/net/cassini.c
@@ -2037,6 +2037,7 @@
 
 		skb_shinfo(skb)->nr_frags++;
 		skb->data_len += hlen - swivel;
+		skb->truesize += hlen - swivel;
 		skb->len      += hlen - swivel;
 
 		get_page(page->buffer);