renamed the string for layer selection

src/fi/utu/dtek1066/MapDialog.java

@@ -199,7 +199,7 @@ public class MapDialog extends JFrame {
       s = s.substring(0, s.length() - 1);
     }
 
-    final String ss = s.toString();
+    final String layerSelection = s.toString();
     new Thread() {
       @Override
       public void run() {
@@ -209,7 +209,7 @@ public class MapDialog extends JFrame {
           url = new URL("http://demo.mapserver.org/cgi-bin/wms?SERVICE="
               + "WMS&VERSION=1.1.1&REQUEST=GetMap&BBOX=-180,-90,180,90&SRS=" + "EPSG:4326&WIDTH="
               + (MapDialog.this.getWidth() - MapDialog.this.leftPanel.getWidth()) + "&HEIGHT="
-              + MapDialog.this.getHeight() + "&LAYERS=" + ss + "&STYLES="
+              + MapDialog.this.getHeight() + "&LAYERS=" + layerSelection + "&STYLES="
               + "&FORMAT=image/png&TRANSPARENT=true");
         } catch (MalformedURLException e) {
           e.printStackTrace();