Include position info in function application

This allows error messages like:

  error: the anonymous function at `/etc/nixos/configuration.nix:1:1'
    called without required argument `foo', at
    `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:77:59'

src/libexpr/eval-inline.hh

@@ -35,7 +35,7 @@ void EvalState::forceValue(Value & v)
         }
     }
     else if (v.type == tApp)
-        callFunction(*v.app.left, *v.app.right, v);
+        callFunction(*v.app.left, *v.app.right, v, noPos);
     else if (v.type == tBlackhole)
         throwEvalError("infinite recursion encountered");
 }