firewire: core: Fix tlabel exhaustion problem

fw_core_handle_response() was not properly clearing tlabel_mask. This
was resulting in premature tlabel exhaustion.
Signed-off-by: Peter Hurley <phurley@charter.net>

This fixes an omission in 2.6.31-rc1 commit 1e626fdc "firewire: core:
use more outbound tlabels" which prevented to really use 64 instead of
32 transaction labels, as soon as split transactions occurred that had
their AR-resp tasklet run after the AT-req tasklet.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

drivers/firewire/core-transaction.c

@@ -842,7 +842,7 @@ void fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
 	list_for_each_entry(t, &card->transaction_list, link) {
 		if (t->node_id == source && t->tlabel == tlabel) {
 			list_del(&t->link);
-			card->tlabel_mask &= ~(1 << t->tlabel);
+			card->tlabel_mask &= ~(1ULL << t->tlabel);
 			break;
 		}
 	}