modify all equals() functions in Util.js (Size, Pixel, LonLat, Bounds) such that if a null value is passed in, they return false. Tests updated to make sure this is true.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@608 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -48,10 +48,15 @@ OpenLayers.Pixel.prototype = {
     * @param {OpenLayers.Pixel} px
     * 
     * @return whether or not the point passed in as parameter is equal to this
+    *          note that if px passed in is null, returns false
     * @type bool
     */
     equals:function(px) {
-        return ((this.x == px.x) && (this.y == px.y));
+        var equals = false;
+        if (px != null) {
+            equals = ((this.x == px.x) && (this.y == px.y));
+        }
+        return equals;
     },
 
     /**
@@ -127,11 +132,16 @@ OpenLayers.Size.prototype = {
     * @param {OpenLayers.Size} sz
     * @returns Boolean value indicating whether the passed-in OpenLayers.Size 
     *          object has the same w and h components as this
+    *          note that if sz passed in is null, returns false
     *
     * @type bool
     */
     equals:function(sz) {
-        return ((this.w == sz.w) && (this.h == sz.h));
+        var equals = false;
+        if (sz != null) {
+            equals = ((this.w == sz.w) && (this.h == sz.h));
+        }
+        return equals;
     },
     
     /** @final @type String */
@@ -203,11 +213,16 @@ OpenLayers.LonLat.prototype = {
     * @param {OpenLayers.LonLat} ll
     * @returns Boolean value indicating whether the passed-in OpenLayers.LonLat
     *          object has the same lon and lat components as this
+    *          note that if ll passed in is null, returns false
     *
     * @type bool
     */
     equals:function(ll) {
-        return ((this.lon == ll.lon) && (this.lat == ll.lat));
+        var equals = false;
+        if (ll != null) {
+            equals = ((this.lon == ll.lon) && (this.lat == ll.lat));
+        }
+        return equals;
     },
     
     /** @final @type String */
@@ -282,12 +297,19 @@ OpenLayers.Bounds.prototype = {
     * @param {OpenLayers.Bounds} bounds
     * @returns Boolean value indicating whether the passed-in OpenLayers.Bounds
     *          object has the same left, right, top, bottom components as this
+    *           note that if bounds passed in is null, returns false
     *
     * @type bool
     */
     equals:function(bounds) {
-        return ((this.left == bounds.left) && (this.right == bounds.right) &&
-                (this.top == bounds.top) && (this.bottom == bounds.bottom));
+        var equals = false;
+        if (bounds != null) {
+            equals = ((this.left == bounds.left) && 
+                      (this.right == bounds.right) &&
+                      (this.top == bounds.top) && 
+                      (this.bottom == bounds.bottom));
+        }
+        return equals;
     },
 
     /**