Fix SVG configuration assignment in offset_multi200 example

Author: radevgit

examples/offset_multi200.rs

@@ -5,7 +5,7 @@ fn main() {
     let mut cfg = OffsetCfg::default();
     // This will create an SVG file at /tmp/pline1.svg
     let mut svg = SVG::new(800.0, 800.0, Some("/tmp/multi200.svg"));
-    // cfg.svg = Some(&mut svg);
+    cfg.svg = Some(&mut svg);
     cfg.svg_orig = true;
     cfg.svg_final = true;