Ticket #1249: OpenLayers.Map.patch

Map.js

@@ -836 +836 @@
-        var oldExtent = null;
-        if (this.baseLayer) {
-            oldExtent = this.baseLayer.getExtent();
+            oldProjection = this.getProjectionObject();
-        }
-
-        if (newBaseLayer != this.baseLayer) {
@@ -866 +867 @@
-                    var newCenter = (oldExtent) 
-                        ? oldExtent.getCenterLonLat()
-                        : center;
+                        
+                    if(!oldProjection.equals(this.getProjectionObject())) {
+                        newCenter.transform(oldProjection, this.getProjectionObject());
+                        oldExtent.transform(oldProjection, this.getProjectionObject());
+                    }
-
-                    //the new zoom will either come from the old Extent or 
-                    // from the current resolution of the map                                                

Layer/SphericalMercator.js

@@ -128 +128 @@
-    },
-    
-    /**
-Forward 
+Inverse
-     * Given an object with x and y properties in Spherical Mercator, modify
-     * the x,y properties on the object to be the unprojected coordinates.
-     *