find_call_out - find a call out scheduled to be called next

int find_call_out( string func );

Find the first call out due to be executed for function 'func', and
return the time left. If it is not found, then return -1.

See also:
 call_out,
 remove_call_out,
 set_heart_beat

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