[cairo] Error handling patch

[Carl Worth]

On Wed, 27 Jul 2005 20:06:55 -0400, Owen Taylor wrote:
> Here's a patch for this - it was pretty straightforward since font faces
> are by definition immutable. Like everything else here, the new code
> paths aren't really tested, but it seems to work fine when no errors
> are occurring.

Thanks.

> @@ -791,6 +831,9 @@ cairo_scaled_font_create (cairo_font_fac
>      cairo_cache_t *cache;
>      cairo_status_t status;
>  
> +    if (font_face->status)
> +	return (cairo_scaled_font_t*) &_cairo_scaled_font_nil;
> +

Missing:

	_cairo_error (font_face->status);

here?

Or, maybe not, because this isn't a root cause error?

I'm definitely still trying to get a handle on the style
here. Ensuring 1 and 1 only _cairo_error for each error is definitely
a harder thing to get right in the code. I fear we're more likely to
let some errors slip through without a call to _cairo_error at all.

Anyway, the patch here looks good.

-Carl
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