DINPUT: Enforce single mouse acquire

[Dmitry Timoshkov]

On Wed, 2006-01-25 at 17:32 -0500, Alex Villací­s Lasso wrote:

> +    if (This == NULL) {
> +        ERR("mouse hook called with no current lock!\n");
> +        return 0;
> +    }
> +
>      if (code != HC_ACTION) return CallNextHookEx( This->hook, code,
wparam, lparam );

You need to call CallNextHookEx in any case, otherwise it might break
other hooks in the chain. Probably just add a check for This being NULL
in the same place as the code checks for HC_ACTION.

-- 
Dmitry.