When RndWlk fails, the old surrounding-exploring routines are used

for obtaining some valid translation vector (of cell movement) -- this has not changed :-)
However, we used to use a "binning" during sampling of the surrounding space
to speed up the process considerably. Now, this process is activated
(depending on the scene, of course) only sparsly and so we can afford to
wait longer and recover more possible translations. In this commit,
the sampling was returned to the full-res one -- as it once used to be.

M    cellScm.cpp