Fix problem with use of undefined variable, reformat correspondent place

Author: linev

scripts/JSRootPainter.js

@@ -5230,11 +5230,11 @@
 
          var svg = d3.select(svg3d);
 
-         var layer = main.svg_layer("special_layer");
-         group = layer.append("g")
-                      .attr("class","temp_saveaspng")
-                      .attr("transform", "translate(" + sz.x + "," + sz.y + ")");
-         group.node().appendChild(svg3d);
+         main.svg_layer("special_layer")      // select layer
+             .append("g")                     // create special group
+             .attr("class","temp_saveaspng")
+             .attr("transform", "translate(" + sz.x + "," + sz.y + ")")
+             .node().appendChild(svg3d);      // add code
       }, true);
 
 //      if (((can3d === 1) || (can3d === 2)) && main && main.Render3D) {