bug#7952: 24.0.50; crash in find_interval

[Romain Francoise]

Eli Zaretskii <eliz@gnu.org> writes:

> I fixed this on the trunk (revision 104055).

I'm happy to confirm that rev 104055 doesn't crash anymore, thank
you very much!

Not sure if it's related, but using grep results in lots of those in
the Messages buffer:

| Error during redisplay: (args-out-of-range 26100 26140)
| Error during redisplay: (args-out-of-range 55792 55803)
| Error during redisplay: (args-out-of-range 89118 89155)
| Error during redisplay: (args-out-of-range 107767 107804)
| Error during redisplay: (args-out-of-range 119160 119176)
| Error during redisplay: (args-out-of-range 152422 152434)