Calling curried static functions of types inside a "namespace rec" raises warning FS0040

**Repro steps**

1. Write the following code in a file:
``` fsharp
namespace rec Test

type MyType = MyType of int
with
static member Create i j = MyType <| i + j

module MyType =
let mt = MyType.Create 475 724
```
2. Compile it.

**Expected behavior**

The code compiles without warnings, and `mt` contains `MyType 1199`.

**Actual behavior**

The compiler emits an FS0040 warning (This and other recursive references to the object(s) being defined will be checked for initialization-soundness at runtime through the use of a delayed reference. [...]) at `MyType.Create 475`.

**Known workarounds**

* Remove the `rec` in the namespace declaration.
* Make MyType.Create a non-curried function.

**Related information**

The bug is also reproduced [on SharpLab](https://sharplab.io/#v2:EYLgxg9gTgpgtADwGwBYA0AbEAzAzgHwDsBDAWxlwAdiwYACWMOgFQoBcBYAKG7YE9K9ALJ9mA+gF46IsYLoRsdAJaFOXAO5K2AC2519dXG2JslTcqWAwodAMKwT9JXQBWdKTPF0APPmV0Aalc9A25SCAATAFcMYVEvCRD9WLY6UlSPeMEAOnsYRzoABjoARiA==).

* Operating system: Windows 10 Education
* .NET Runtime kind (.NET Core, .NET Framework, Mono): .NET Core SDK 2.1.701