More map_simplify fixes from Alan Cox.  This very significanly improves the performance when the map has been chopped up.  The map simplify operations really work now. Reviewed by: dyson Submitted by:	Alan Cox <alc@cs.rice.edu>
More map_simplify fixes from Alan Cox.  This very significanly improves the
performance when the map has been chopped up.  The map simplify operations
really work now.
Reviewed by: dyson
Submitted by:	Alan Cox <alc@cs.rice.edu>

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