query_shadowing - determine whether or not a given object it shadowing another

object query_shadowing( object ob );

This efun is only available if NO_SHADOWS is not compiled in.

Returns the object that `ob' is shadowing, or zero (0) if it is not
shadowing any object.

See also:
 shadow,
 valid_shadow

 Tim Hollebeek  Beek@ZorkMUD, Lima Bean, IdeaExchange, and elsewhere
