Fix bug where fillPolygon would only draw the ouline

Author: Krassnig

src/main/java/codedraw/Image.java

@@ -1368,7 +1368,7 @@ public void fillPolygon(double x1, double y1, double x2, double y2, double x3, d
 		checkNaNAndInfinity(vertices, "vertices");
 
 		beforeDrawing();
-		drawPolygon(new DoubleList().add(x1, y1, x2, y2, x3, y3).add(vertices).toArray());
+		fillPolygon(new DoubleList().add(x1, y1, x2, y2, x3, y3).add(vertices).toArray());
 		afterDrawing();
 	}