Microsoft.UI.Interop.h causes -Wmissing-field-initializers when using ClangCL

[dlech]

Describe the bug

C:\Users\david\Documents\GitHub\pywinrt\projection\..\_tools\Microsoft.WindowsAppSDK\include\winrt/Microsoft.UI.Interop.h 
(42,52): error : missing field 'pfnGetWindowFromWindowId' initializer [-Werror,-Wmissing-field-initializers] [C:\Users\da 
vid\Documents\GitHub\pywinrt\_build\clang-cl\_winrt_microsoft_ui_interop.vcxproj]

Steps to reproduce the bug

Build a project that has #include Microsoft.UI.Interop.h> and compile it using clang-cl.

Expected behavior

Project should compile without error.

Screenshots

No response

NuGet package version

Windows App SDK 1.5.4: 1.5.240607001

Packaging type

No response

Windows version

No response

IDE

Other

Additional context

The problem is this line:

__declspec(selectany) InteropImpl s_impl { nullptr };

It should be:

__declspec(selectany) InteropImpl s_impl { };

because the struct has multiple fields.