deroff: fix out-of-bounds access if runes above 0X80 are inside EQ clauses (thanks mmnmnnmnmm, via plan9port)

Characters greater than 0X80 will cause a read beyond the bounds of the
array chars[]. For particular unicode characters this can cause deroff
to segfault.

A minimal example:
$ deroff
.EQ
u∈
Segmentation fault

Throughout deroff, charclass() is used instead of directly indexing
chars[] so I presume this was just missed.

0 files changed, 0 insertions, 0 deletions