[coreboot] Infinite loop in cbfstool

[Myles Watson]

If you try to add a payload that is larger than the available space, and not
at a specific location (location == 0), it hangs in an infinite loop.  It's
something like:

if contentsize <= length or location is right {
    insert record
}
if location == 0
    continue.

I wasn't sure where the best place to put the increment of current was.  Do
you have any suggestions?

Thanks,
Myles