* (Contour): Allocation of points and control arrays is controlled

	by the Contour procedure in tkZinc.c so there no point in
	duplicating the effort here. Moreover the extra space is never
	deallocated.
	* (Render): Fixed the pattern filling under openGL. Stippling
	can't be used to fill patterns. Now texture mapping is used
	instead. As a side effect -fillpattern and -tile use the same
	internal variable reducing memory requirements.
        * (Init): Properly initialize the winding direction of
	the first contour given at creation time.

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