[Yum] when mediaid is provided yum crash instead of disabling it

[seth vidal]

On Fri, 2010-07-09 at 15:07 +0300, Muayyad AlSadi wrote:
> > Can you tell me the version of things you're running  and if you're
> > seeing the above from simply running yum from thje cli?
> >
> > -sv
> 
> yes I got that from cli, details below
> 

Patch sent to fix this issue in yum. Waiting on ack from another dev.

-sv