[PATCH] msi: Unlock msi_custom_action_c on the error paths

[Zebediah Figura]

To be clear, these error paths shouldn't happen; the installer is still
broken. But we should still clean up here, so:

Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>

On 16/08/18 15:31, Michael Stefaniuc wrote:
> Wine-Bugs: https://bugs.winehq.org/show_bug.cgi?id=45483
> Signed-off-by: Michael Stefaniuc <mstefani at winehq.org>
> ---
> This lets the DX8 SDK finally install for me.
> 
> 
>  dlls/msi/custom.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/dlls/msi/custom.c b/dlls/msi/custom.c
> index 950681e76c..cd37a56d93 100644
> --- a/dlls/msi/custom.c
> +++ b/dlls/msi/custom.c
> @@ -678,11 +678,13 @@ static DWORD WINAPI custom_client_thread(void *arg)
>          size != sizeof(info->guid))
>      {
>          ERR("Failed to write to custom action client pipe: %u\n", GetLastError());
> +        LeaveCriticalSection(&msi_custom_action_cs);
>          return GetLastError();
>      }
>      if (!ReadFile(pipe, &thread64, sizeof(thread64), &size, NULL) || size != sizeof(thread64))
>      {
>          ERR("Failed to read from custom action client pipe: %u\n", GetLastError());
> +        LeaveCriticalSection(&msi_custom_action_cs);
>          return GetLastError();
>      }
>  
>