[3/5] strmbase: Add validation checks when updating destination rectangle.

[Andrew Eikum]

On Sun, Nov 20, 2016 at 03:33:24PM +0900, Akihiro Sagawa wrote:
> @@ -73,6 +73,17 @@ static HRESULT BaseControlVideoImpl_CheckSourceRect(BaseControlVideo *This, RECT
>      return S_OK;
>  }
>  
> +static HRESULT BaseControlVideoImpl_CheckTargetRect(BaseControlVideo *This, RECT *pTargetRect)
> +{
> +    if (pTargetRect->top >= pTargetRect->bottom ||
> +        pTargetRect->left >= pTargetRect->right ||
> +        (pTargetRect->bottom - pTargetRect->top) <= 0 ||
> +        (pTargetRect->right - pTargetRect->left) <= 0)
> +        return E_INVALIDARG;
> +

The third and fourth conditions seem redundant with the first and
second. You could use IsRectEmpty() here as well.

Andrew