[PATCH v3 0/1] MR171: Initialize a pointer for MSVC.

[Stefan Dösinger (＠stefan)]

MSVC is too stupid to see that line 3058 will not run unless n_variants
has been set together with variants in the switch statement below.

--
  v3: vkd3d-shader/hlsl: Make sure variants is initialized in declare_predefined_types().

https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/171