core: fix for bitwise test in core rpc command

(cherry picked from commit f662a62519f99e046caf03063147104af22ec3c3)

src/core/core_cmd.c

@@ -943,7 +943,7 @@ static void core_sockets_list(rpc_t* rpc, void* c)
 				rpc->struct_add(ha, "ss",
 						"proto", get_proto_name(proto),
 						"address", si->name.s);
-				if (!si->flags & SI_IS_IP)
+				if (!(si->flags & SI_IS_IP))
 					rpc->struct_add(ha, "s",
 						"ipaddress", si->address_str.s);
 				rpc->struct_add(ha, "sss",