Commit Fix for #654: Layer should not redraw on setVisibility(false). For

some layers, this is a significant performance enhancement. Includes regression
tests.


git-svn-id: http://svn.openlayers.org/trunk/openlayers@3041 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer.js

@@ -347,7 +347,7 @@ OpenLayers.Layer.prototype = {
         if (visibility != this.visibility) {
             this.visibility = visibility;
             this.display(visibility);
-            if (this.map != null) {
+            if (visibility && this.map != null) {
                 var extent = this.map.getExtent();
                 if (extent != null) {
                     this.moveTo(extent, true);