[Image-SIG] Re: PIL Bug: Crash processing GIF image

[Fredrik Lundh]

> it looks like the GIF codec messes up when it's trying to determine
> the right size of the file, which results in a 62004-pixel high image
> memory, which results in a 0-pixel wide thumbnail, which causes the
> quantization code to mess up.

here's a quick fix for the quantization code.  convert(ADAPTIVE) of a
zero-sized image will still result in a traceback after this change; that's
likely to be changed in 1.1.5.

</F>

==== //modules/pil/libImaging/Quant.c#4 (ktext) ====

*** 1593,1599 ****

      } else {

-         free(p);
          return (Imaging) ImagingError_ValueError("quantization error");

      }
--- 1594,1599 ----