bug#1990: 23.0.60; Emacs trying too hard to find fonts that don't exist

[Jason Rumney]

Juanma Barranquero wrote:
> It does not fix #1990, though. Emacs is still repeatedly trying to
> find fonts for characters that do not have one:
>
> 9 matches for "1501" in buffer: *Help*
>      28:font for: (1501 . hebrew-iso8859-8)
>     218:font for: (1501 . mule-unicode-0100-24ff)

That looks much better though. Before, each "font for:" log entry was 
followed by a dozen or so "list:" entries, which is what takes excessive 
time on Windows.