fix github issue 221 - unfixable troubles

fix github issue 221 - unfixable troubles

Fixes #221

Routine unfixeable_trouble_count() is used for both applying a unicorn
horn (possibly internally via #monster if poly'd into a unicorn) and
drinking a blessed potion of restore ability.  For the latter case, it
always gave the wrong answer (unless the hero happened to be all of
Sick and Stunned and Confused and Hallucinating and Vomiting and Deaf).
Since the actual count wasn't used to decide whether hero felt "great"
or just "good", having any of those conditions would hide the problem.