ipwireless: fix compile failure

There's a brown paper bag compile failure introduced by this patch

commit a0138692
Author: David Sterba <dsterba@suse.cz>
Date:   Mon Jul 28 16:53:32 2008 +0200

    ipwireless: Preallocate received packet buffers with MRU size

Really, it can't ever have been even compile tested.  It looks like the
closing bracket is in the wrong place, so this is the fix.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/pcmcia/ipwireless/hardware.c

@@ -568,7 +568,7 @@ static struct ipw_rx_packet *pool_allocate(struct ipw_hardware *hw,
 			list_del(&packet->queue);
 		} else {
 			const int min_capacity =
-				ipwireless_ppp_mru(hw->network + 2);
+				ipwireless_ppp_mru(hw->network) + 2;
 			int new_capacity;
 
 			spin_unlock_irqrestore(&hw->lock, flags);