Bad hack to attempt to close path

Author: JimBobSquarePants

src/ImageSharp.Drawing/Shapes/PolygonClipper/PolygonStroker.cs

@@ -62,14 +62,15 @@ public double MiterLimitTheta
 
     public Polygon ProcessPath(ReadOnlySpan<PointF> pathPoints)
     {
-        for (int i = 0; i < pathPoints.Length - 1; i++)
+        for (int i = 0; i < pathPoints.Length; i++)
         {
             PointF point = pathPoints[i];
             this.AddVertex(point.X, point.Y, PathCommand.LineTo);
         }
 
-        // This doesn't actually add the point. It triggers a close.
-        this.AddVertex(pathPoints[^1].X, pathPoints[^1].Y, PathCommand.EndPoly);
+        this.AddVertex(pathPoints[^1].X, pathPoints[^1].Y, PathCommand.LineTo);
+        this.closed = 1;
+        this.Rewind();
 
         double x = 0;
         double y = 0;