[XeTeX] problems with external figures

[Akira Kakuto]

> > Hello,
> >
> > I'm trying to include an image, but the following fails for some  
> > reason:
> >
> > {\XeTeXpicfile 'a.jpg'}
> > \bye
> >
> > ! Unable to load picture or PDF file 'a.jpg}'.
> 
> You need to ensure there is a space after the filename, to let (Xe) 
> TeX know when to stop reading it. Thus,
> 
> {\XeTeXpicfile 'a.jpg' }
> \bye

I think for pdf, one must use \XeTeXpdffile.
jpeg, png and bmp are ok by \XeTeXpicfile.
(I think non-Mac XeTeX_pic.c shows the above.)

Best,
Akira