bug#14254: 24.3; read-number fails to recognize faulty numbers (string-to-number toblame)

[Drew Adams]

> > Now (string-to-number "junk") returns 0.
> 
> It always did, as documented.

The regression comes from this change in `read-number' (not from a change in
`string-to-number'):

Old (good): (read str)
New (bad) : (string-to-number str)