Add optional cc (counter-clockwise) argument to the python version of plpoly3.  This python API change is required to get identical results for xw18.py and the other 18th examples such as x18.tcl or x18c.c
Add optional cc (counter-clockwise) argument to the python version of
plpoly3.  This python API change is required to get identical results for
xw18.py and the other 18th examples such as x18.tcl or x18c.c

svn path=/trunk/; revision=3676

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