Fix is_duplicate_packet() bug for fragmentation number setting.

Signed-off-by: James Ketrenos <jketreno@linux.intel.com>

drivers/net/wireless/ipw2200.c

@@ -7754,10 +7754,10 @@ static inline int is_duplicate_packet(struct ipw_priv *priv,
 		if (*last_frag + 1 != frag)
 			/* out-of-order fragment */
 			goto drop;
-		*last_frag = frag;
 	} else
 		*last_seq = seq;
 
+	*last_frag = frag;
 	*last_time = jiffies;
 	return 0;