Stop click events from falling through to the map.

git-svn-id: http://svn.openlayers.org/branches/openlayers/2.0@1315 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/MouseToolbar.js

@@ -69,6 +69,7 @@ OpenLayers.Control.MouseToolbar.prototype =
         btn.events = new OpenLayers.Events(this, btn);
         btn.events.register("mousedown", this, this.buttonClick); 
         btn.events.register("mouseup", this, Event.stop);
+        btn.events.register("click", this, Event.stop);
         btn.action = id;
         btn.title = title;
         btn.alt = title;