ipv6: fix incorrect type in declaration

Introduced by 1397ed35f2
  "ipv6: add flowinfo for tcp6 pkt_options for all cases"

Reported-by: kbuild test robot <fengguang.wu@intel.com>

V2: fix the title, add empty line after the declaration (Sergei Shtylyov
feedbacks)

Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/ipv6_sockglue.c

@@ -1035,7 +1035,8 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 				put_cmsg(&msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim);
 			}
 			if (np->rxopt.bits.rxflow) {
-				int flowinfo = np->rcv_flowinfo;
+				__be32 flowinfo = np->rcv_flowinfo;
+
 				put_cmsg(&msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
 			}
 		}