[PATCH v4 0/1] MR5490: setupapi: Don't set RequiredSize when SetupDiGetClassDescription* fails.

[Alex Henrie (＠alexhenrie)]

Discovered while investigating Bug 56551.

--
  v4: setupapi: Don't set RequiredSize when SetupDiGetClassDescription* fails.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/5490