[Mesa-stable] [Mesa-dev] [PATCH] glx: Properly handle cases where screen creation fails

[Chuck Atkins]

> > -   if (xmdpy->smapi->destroy)
> > -      xmdpy->smapi->destroy(xmdpy->smapi);
> > -   free(xmdpy->smapi);
> > +   if (xmdpy->smapi)
> > +   {
> > +      if (xmdpy->smapi->destroy)
> > +         xmdpy->smapi->destroy(xmdpy->smapi);
> > +      free(xmdpy->smapi);
> > +   }
>
> I don't know this code so I don't know if the patch is right, but just
> pointing out this hunk could be written as a simple one-line change:
>
> -   if (xmdpy->smapi->destroy)
> +   if (xmdpy->smapi && xmdpy->smapi->destroy)
>

Combining the two would cause  xmdpy->smapi to leak when the
xmdpy->smapi->destroy callback is null.  This way, destroy get's called
when it's set but xmdpy->smapi always gets freed.

- Chuck
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