getpos() 'm','M' and 'o','O'

getpos() 'm','M' and 'o','O'

Always include the hero's location in the set of spots for 'm',&c to
cycle through.  This way the set will never be empty so checks for that
can be dropped, and choosing initial index becomes trivial (set to 0,
then increment to reach nearest spot of interest or decrement to reach
farthest).  Also, it makes it easier for player to see when successive
'm's,&c have been through all the interesting locations if there are
multiple monsters or objects clumped near the last one in the cycle.