[PATCH] remove unrequired checking in nfnetlink_get_subsys

subsys_table is initialized to NULL, therefore just returns NULL in case
that it is not set.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Index: net-2.6.git/net/netfilter/nfnetlink.c
===================================================================
--- net-2.6.git.orig/net/netfilter/nfnetlink.c	2006-12-26 04:34:18.000000000 +0100
+++ net-2.6.git/net/netfilter/nfnetlink.c	2006-12-26 04:37:59.000000000 +0100
@@ -72,8 +72,7 @@ static inline struct nfnetlink_subsystem
 {
 	u_int8_t subsys_id = NFNL_SUBSYS_ID(type);
 
-	if (subsys_id >= NFNL_SUBSYS_COUNT
-	    || subsys_table[subsys_id] == NULL)
+	if (subsys_id >= NFNL_SUBSYS_COUNT)
 		return NULL;
 
 	return subsys_table[subsys_id];