[Coco] getenv bug in cgfx explanation

[Willard Goosey]

Humm, doing this backwards...

Anyway, the bug in the cgfx7 getenv() is that it does a
shortest-substring match on the request variable name.  The easiest
way to demonstrate:
getenv("PALET10") returns the value of PALET1.  Indeed,
getenv("PALET75") returns the value of PALET7!

New version fixes that by using a string-compare limited by the length
of the name it's searching for, not the length of the name we're
checking.

I am really amazed that no-one's caught this before.

I am equally befuddled by how best to distribute this.

And I appologize for the tone of my last message.  I was... slightly
annoyed... but some food made it much better. :-)

Willard
-- 
Willard Goosey  goosey at sdc.org
Socorro, New Mexico, USA
I search my heart and find Cimmeria, land of Darkness and the Night.
  -- R.E. Howard