[PATCH 0/1] MR10214: shell32: Only compute HASSUBFOLDER if requested.

[Tatsuyuki Ishi (＠ishitatsuyuki)]

SFGAO_HASSUBFOLDER enumerates the whole subdirectory and the slowness is
immediately noticeable in the system file dialog when opening /.

Most shell32 users don't require HASSUBFOLDER so skip the computation when
not requested.

Checked that the file dialog is no longer painfully slow with this change.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/10214