Hello,

I've recently updated my Debian installation from stretch (9, stable) to
buster (10, testing) and I got to install Emacs 26.1 + enchant. But
sadly the version in the Debian repository is still too old (1.6 vs
2.1). But when changing back to aspell, I was informed that aspell was
too old (0.6 vs 2.1).

It's easy to reproduce the bug, assuming one's enchant is also too
old. Simply eval

	(setq-default ispell-program-name (executable-find "enchant"))

try spell-checking any word (which should lead to an error), followed by

	(setq-default ispell-program-name (executable-find "aspell"))

or whatever one was using before. Any spell-checking should still not
work, and an error will be reported no matter what version of
aspell/hunspell/ispell one uses.

Looking through the code I noticed that the issue was simply caused by
forgetting to reset the variable `ispell-really-enchant`, thus resetting
it fixes the issue.

I hope I haven't messed something up in the process, since this is the
first time I'm sending a patch. If that's not the case, please tell me
and I'll be eager to fix any issue (related to this bug).

	Sincerely,
	Philip K.
    https://zge.us.to