fixing bug introduced with r1134

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1172 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/LayerSwitcher.js

@@ -125,11 +125,9 @@ OpenLayers.Control.LayerSwitcher.prototype =
             var labelSpan = document.createElement("span");
             labelSpan.innerHTML = layer.name;
             labelSpan.style.verticalAlign = (baseLayer) ? "bottom" : "auto";
-            if (!(baseLayer && checked)) {
             Event.observe(labelSpan, 
                           "click", 
                           this.onLabelClick.bindAsEventListener(inputElem));
-            }
 
             // create line break
             var br = document.createElement("br");
@@ -161,7 +159,10 @@ OpenLayers.Control.LayerSwitcher.prototype =
      * @param {Event} e
      */
     onLabelClick: function(e) {
+        var clickedRadioButton = ((this.type == "radio") && (this.checked));
+        if (!clickedRadioButton) {
             this.checked = !this.checked;
+        }
     },
     
     /** Need to update the map accordingly whenever user clicks in either of