HCCGENERAL-130: Patch OpenLayers to support multiple OpenLayers.Layer…

… objects with isBaseLayer = true. This patch allows Fusion to use and support multiple tiled map definitions, provided each tiled map definition contains only one base layer group in it.

lib/OpenLayers/OpenLayers.js

@@ -6786,7 +6786,7 @@ OpenLayers.Map = OpenLayers.Class({
                 // set the first baselaye we add as the baselayer
                 this.setBaseLayer(layer);
             } else {
-                layer.setVisibility(false);
+                //layer.setVisibility(false);
             }
         } else {
             layer.redraw();
@@ -7565,6 +7565,21 @@ OpenLayers.Map = OpenLayers.Class({
                 }
             }
 
+            //In the event of more than one base layer, send the move call to them too
+            for (var i=0, len=this.layers.length; i<len; i++) {
+                var layer = this.layers[i];
+                if (layer !== this.baseLayer && layer.isBaseLayer) {
+                    layer.moveTo(bounds, zoomChanged, dragging);
+                    if(dragging) {
+                        layer.events.triggerEvent("move");
+                    } else {
+                        layer.events.triggerEvent("moveend",
+                            {"zoomChanged": zoomChanged}
+                        );
+                    }
+                }
+            }
+
             bounds = this.baseLayer.getExtent();
 
             for (var i=0, len=this.layers.length; i<len; i++) {