w32: buglike behavior ver. 22.0.50.1 on msw98

[eminmn]

I kwow that the use of proportional fonts is deprecated but since emacs
does allow them, it should protect itself from them. On C-h a  "command"
(e.g. help-apropos-"command" in version 21.3  the line for
"self-insert-command" is 2446 characters long (via column-mode) in 22.0
this same routine produces a line in the *Apropos* buffer that may be
more than a million characters long (i.e. all the characters from all the
Unicode ranges that arialuni.ttf includes). At this point Emacs locks up
and the process must be terminated by "End Task" Shouldn't this line
be truncated after the ascii range or just list the ranges of self-inserts
rather than each character?

Thanks,

Ed.