fix hh compilation on trunk

Summary:
probably got broken due to landing D14504272 and some other diff at the same time
(Context: there was quite a few weeks where no diffs could be landed and now all diffs land at the same time :()

Reviewed By: manzyuk

Differential Revision: D14562461

fbshipit-source-id: 616e573d2f1814a22a413d5bc25caed201ef64f7

hphp/hack/src/typing/tast_env.ml

@@ -54,7 +54,7 @@ let get_self env =
 let fresh_type = Typing_env.fresh_type
 let open_tyvars = Typing_env.open_tyvars
 let close_tyvars_and_solve = Typing_subtype.close_tyvars_and_solve
-let set_tyvar_variance = Typing_env.set_tyvar_variance
+let set_tyvar_variance env ty = Typing_env.set_tyvar_variance env ty
 let get_class = Typing_env.get_class
 let is_static = Typing_env.is_static
 let is_strict = Typing_env.is_strict