[ddraw/dsurface/dib.c] Check for NULL

[Paul Vriens]

On Wed, 2005-03-09 at 19:01, Christian Costa wrote:
> > Message du 09/03/05 16:52
> > De : "Paul Vriens" 
> > A : "wine-patches at winehq.org" 
> > Copie à : 
> > Objet : [ddraw/dsurface/dib.c] Check for NULL
> > 
> > Hi,
> > 
> > the recent 'ddraw lock' changes crash Zoo Tycoon 1 Demo.
> > 
> > Changelog
> > Check for NULL before touching src.
> > 
> > Cheers,
> > 
> > Paul.
> > >
> 
> If src == NULL, you still need to check if the destination surface is not locked.
> 
> Bye,
> Christian
You mean:

    if (This->locked) {
        WARN(" Surface is busy, returning DDERR_SURFACEBUSY\n");
        return DDERR_SURFACEBUSY;
    }
                                                                                                                                        
    if (src != NULL) {
        if (((IDirectDrawSurfaceImpl *)src)->locked) {
            WARN(" Surface is busy, returning DDERR_SURFACEBUSY\n");
            return DDERR_SURFACEBUSY;
        }
    }

or something alike? 

Cheers,

Paul.