net/ieee80211: fix more crypto-related build breakage

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/net/ieee80211/ieee80211_crypt_wep.c b/net/ieee80211/ieee80211_crypt_wep.c
index 9eeec13..1b2efff 100644
--- a/net/ieee80211/ieee80211_crypt_wep.c
+++ b/net/ieee80211/ieee80211_crypt_wep.c
@@ -50,7 +50,7 @@
 	if (IS_ERR(priv->tx_tfm)) {
 		printk(KERN_DEBUG "ieee80211_crypt_wep: could not allocate "
 		       "crypto API arc4\n");
-		priv->tfm = NULL;
+		priv->tx_tfm = NULL;
 		goto fail;
 	}
 
@@ -58,6 +58,7 @@
 	if (IS_ERR(priv->rx_tfm)) {
 		printk(KERN_DEBUG "ieee80211_crypt_wep: could not allocate "
 		       "crypto API arc4\n");
+		priv->rx_tfm = NULL;
 		goto fail;
 	}
 	/* start WEP IV from a random value */