Make recently added collect_coords() global even though it is still
only being used in teleport.c.
Add CC_SKIP_INACCS flag to only collect accessible locations so that
there's no need for a custom filter callback or of collecting spots
that will always be rejected when put to use. Caller needs to check
Passes_walls/passes_walls() to decide whether that is suitable.
Merge some of the old safe_teleds() with the new, making it try
randomly 40 times before collecting coordinates for an exhaustive
selection. Prior to the recent change which added collect_coords()
it was trying 400 times and giving up if that didn't find a good spot.
Start using collect_coords() for rloc() as well as for safe_teleds().
Only try to pick a spot randomly 50 times now instead of 1000. If
those all fail, it does an exhaustive search of a randomized list of
candidates instead of old left-to-right, top-to-bottom map traversal.
Has not had nearly as much testing as safe_teleds() underwent.
rloc() was explicilty ignoring map column 1 for some reason. Unlike
reserved column 0, column 1 is part of every level and should be
considered for monster teleport destination even though most levels
don't utilize it.
49e93760a8