-Rename is_greystone() to is_graystone() since I've
had one complaint about my choice of spelling for
the macro already.
-Change the recent "#rub touchstone" code to use
the macro which pre-existed under the other spelling
and was already used in the very same "if" statement
with that spelling in invent.c. :-)
magic while wearing dragon scales/scale mail were being turned
into random monsters instead of into dragons.
Also
Two items from <Someone>'s list.
Files patched:
include/obj.h
src/mon.c, muse.c, worn.c, zap.c
