[IPV6]: Fix refcnt of struct ip6_flowlabel

Signed-off-by: Yan Zheng <[e-mail]>
Acked-by: YOSHIFUJI Hideaki <[e-mail]>
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

net/ipv6/ip6_flowlabel.c

···
 						goto done;
 					}
 					fl1 = sfl->fl;
-					atomic_inc(&fl->users);
+					atomic_inc(&fl1->users);
 					break;
 				}
 			}