Issue reported by by vultur-cadens: a vampire lord or lady might change
to wolf form while flying over water or lava, ending flight and dropping
into that water or lava. It would then drown or burn up, revert to
vampire leader form and resume flying, then be teleported since it was
past the check for being in flight.
The fix is pretty staightforward. It is still possible to force wolf
form with the monpolycontrol option, leaving the wolf standing on water
(didn't test for lava) and then drowning on its next move, where it will
revert to vampire form but no longer teleport away. There's no need for
a wizard mode hack to behave more stringently.
Fixes#1435
5fe746a0d6