[CF-Devel] Jan's fixes: I think they should go into CVS

[Peter Mardahl]

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      Peter:  I think a owner == NULL check is missing in the new ball
     
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      lightning code.  And please use the 'direction' parameter of hit_map()
     
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      instead of fiddling with op->x and op->y as this may break other code,
     
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      e.g. optimizations in common/map.c.
     
     
Yes, I changed it to do this stuff already after I looked at your
patches.  I will put the fix in in the next hour.

PeterM