Fix OpenLayers.Pixel and OpenLayers.Size apidoc

'px' parameter for OpenLayers.Pixel.offset and OpenLayers.Pixel.equals
can be either a Pixel or a simple javascript object.
'sz' parameter for OpenLayers.Size.equals can be either a Size or a
simple javascript object.

lib/OpenLayers/BaseTypes/Pixel.js

@@ -68,7 +68,8 @@ OpenLayers.Pixel = OpenLayers.Class({
      * Determine whether one pixel is equivalent to another
      *
      * Parameters:
-     * px - {<OpenLayers.Pixel>}
+     * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
+     *                                  a 'x' and 'y' properties.
      *
      * Returns:
      * {Boolean} The point passed in as parameter is equal to this. Note that
@@ -123,7 +124,8 @@ OpenLayers.Pixel = OpenLayers.Class({
     * APIMethod: offset
     * 
     * Parameters
-    * px - {<OpenLayers.Pixel>}
+    * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
+    *                                  a 'x' and 'y' properties.
     * 
     * Returns:
     * {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the 

lib/OpenLayers/BaseTypes/Size.js

@@ -69,12 +69,12 @@ OpenLayers.Size = OpenLayers.Class({
      * Determine where this size is equal to another
      *
      * Parameters:
-     * sz - {<OpenLayers.Size>}
+     * sz - {<OpenLayers.Size>|Object} An OpenLayers.Size or an object with
+     *                                  a 'w' and 'h' properties.
      *
      * Returns: 
      * {Boolean} The passed in size has the same h and w properties as this one.
      * Note that if sz passed in is null, returns false.
-     *
      */
     equals:function(sz) {
         var equals = false;