netfilter: conntrack: remove uninitialized shadow variable

A recent commit introduced an unconditional use of an uninitialized
variable, as reported in this gcc warning:

net/netfilter/nf_conntrack_core.c: In function '__nf_conntrack_confirm':
net/netfilter/nf_conntrack_core.c:632:33: error: 'ctinfo' may be used uninitialized in this function [-Werror=maybe-uninitialized]
   bytes = atomic64_read(&counter[CTINFO2DIR(ctinfo)].bytes);
                                 ^
net/netfilter/nf_conntrack_core.c:628:26: note: 'ctinfo' was declared here
   enum ip_conntrack_info ctinfo;

The problem is that a local variable shadows the function parameter.
This removes the local variable, which looks like what Pablo originally
intended.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: 71d8c47f ("netfilter: conntrack: introduce clash resolution on insertion race")
Acked-by: NPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/netfilter/nf_conntrack_core.c

@@ -626,7 +626,6 @@ static void nf_ct_acct_merge(struct nf_conn *ct, enum ip_conntrack_info ctinfo,
 	acct = nf_conn_acct_find(loser_ct);
 	if (acct) {
 		struct nf_conn_counter *counter = acct->counter;
-		enum ip_conntrack_info ctinfo;
 		unsigned int bytes;
 
 		/* u32 should be fine since we must have seen one packet. */