set current peer to use it in ngx_http_upstream_free_round_robin_peer()

src/http/modules/ngx_http_upstream_ip_hash_module.c

diff --git a/src/http/modules/ngx_http_upstream_ip_hash_module.c b/src/http/modules/ngx_http_upstream_ip_hash_module.c
index 1c002e5..9604d5f 100644
--- a/src/http/modules/ngx_http_upstream_ip_hash_module.c
+++ b/src/http/modules/ngx_http_upstream_ip_hash_module.c
@@ -195,6 +195,8 @@
         }
     }
 
+    iphp->rrp.current = p;
+
     pc->sockaddr = peer->sockaddr;
     pc->socklen = peer->socklen;
     pc->name = &peer->name;