m_monnam() usage

m_monnam() usage

m_monnam() overrides hallucination, which is appropriate in some
situations but not others.  This fixes one instance where it was
being misused:  discovering a hidden monster when another monster
attacks it was calling either m_monnam() or a_monnam(); one ignores
hallucination and the other doesn't, so accurate or inaccurate
monster type depended on the condition tested.

Figurine activation and egg hatching are using m_monnam(), which
seems suspect, but I left them as is.