[PATCH] netfilter missing symbol has_bridge_parent

[PATCH] netfilter missing symbol has_bridge_parent

5dce971acf2ae20c80d5e9d1f6bbf17376870911 in Linus' tree,
otherwise known as bridge-netfilter-races-on-device-removal.patch in
2.5.15.4 removed has_bridge_parent, however this symbol is still
called with NETFILTER_DEBUG is enabled.

This patch uses the already seeded realoutdev value to detect if a parent
exists, and if so, the value of the parent.

Signed-Off-By: Horms <horms@verge.net.au>
Acked-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>