Fix OpenLayers.Layer and OpenLayers.Map apidoc

'viewPortPx' parameter for OpenLayers.Layer.getLonLatFromViewPortPx
can be either a Pixel or a simple javascript object. 'lonlat'
parameter for OpenLayers.Layer.getViewPortPxFromLonLat can be either a
LonLat or a simple javascript object.

'px' parameter for OpenLayers.Map.getLonLatFromViewPortPx and
OpenLayers.Map.getLonLatFromPixel can be either a Pixel or a simple
javascript object.

lib/OpenLayers/Layer.js

@@ -1227,7 +1227,9 @@ OpenLayers.Layer = OpenLayers.Class({
      * APIMethod: getLonLatFromViewPortPx
      * 
      * Parameters:
-     * viewPortPx - {<OpenLayers.Pixel>}
+     * viewPortPx - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or
+     *                                          an object with a 'x'
+     *                                          and 'y' properties.
      *
      * Returns:
      * {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in 
@@ -1256,11 +1258,13 @@ OpenLayers.Layer = OpenLayers.Class({
      *     fractional pixel values.
      * 
      * Parameters:
-     * lonlat - {<OpenLayers.LonLat>}
+     * lonlat - {<OpenLayers.LonLat>|Object} An OpenLayers.LonLat or
+     *                                       an object with a 'lon'
+     *                                       and 'lat' properties.
      *
      * Returns: 
      * {<OpenLayers.Pixel>} An <OpenLayers.Pixel> which is the passed-in 
-     *     <OpenLayers.LonLat>,translated into view port pixels.
+     *     lonlat translated into view port pixels.
      */
     getViewPortPxFromLonLat: function (lonlat, resolution) {
         var px = null; 

lib/OpenLayers/Map.js

@@ -2345,7 +2345,9 @@ OpenLayers.Map = OpenLayers.Class({
      * Method: getLonLatFromViewPortPx
      * 
      * Parameters:
-     * viewPortPx - {<OpenLayers.Pixel>}
+     * viewPortPx - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or
+     *                                          an object with a 'x'
+     *                                          and 'y' properties.
      * 
      * Returns:
      * {<OpenLayers.LonLat>} An OpenLayers.LonLat which is the passed-in view 
@@ -2388,7 +2390,8 @@ OpenLayers.Map = OpenLayers.Class({
      * APIMethod: getLonLatFromPixel
      * 
      * Parameters:
-     * px - {<OpenLayers.Pixel>}
+     * px - {<OpenLayers.Pixel>|Object} An OpenLayers.Pixel or an object with
+     *                                  a 'x' and 'y' properties.
      *
      * Returns:
      * {<OpenLayers.LonLat>} An OpenLayers.LonLat corresponding to the given