large scale syntactic clean up adding missing semi-colons and curly braces around blocks.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@5002 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/Navigation.js

@@ -108,8 +108,9 @@ OpenLayers.Control.Navigation = OpenLayers.Class(OpenLayers.Control, {
      */
     wheelChange: function(evt, deltaZ) {
         var newZoom = this.map.getZoom() + deltaZ;
-        if (!this.map.isValidZoomLevel(newZoom)) return;
-
+        if (!this.map.isValidZoomLevel(newZoom)) {
+            return;
+        }
         var size    = this.map.getSize();
         var deltaX  = size.w/2 - evt.xy.x;
         var deltaY  = evt.xy.y - size.h/2;