Removing null default values from symbolizers. Later, we could consider static setDefaults methods on the constructors. r=ahocevar (closes #2840)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10770 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Symbolizer/Polygon.js

@@ -17,26 +17,30 @@ OpenLayers.Symbolizer.Polygon = OpenLayers.Class(OpenLayers.Symbolizer, {
      * APIProperty: strokeColor
      * {String} Color for line stroke.  This is a RGB hex value (e.g. "#ff0000"
      *     for red).
+     * 
+     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
      */
-    strokeColor: null,
     
     /**
      * APIProperty: strokeOpacity
      * {Number} Stroke opacity (0-1).
+     * 
+     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
      */
-    strokeOpacity: null,
     
     /**
      * APIProperty: strokeWidth
      * {Number} Pixel stroke width.
+     * 
+     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
      */
-    strokeWidth: null,
     
     /**
      * APIProperty: strokeLinecap
      * {String} Stroke cap type ("butt", "round", or "square").
+     * 
+     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
      */
-    strokeLinecap: null,
     
     /**
      * Property: strokeDashstyle
@@ -44,20 +48,23 @@ OpenLayers.Symbolizer.Polygon = OpenLayers.Class(OpenLayers.Symbolizer, {
      *     OpenLayers values for strokeDashstyle ("dot", "dash", "dashdot",
      *     "longdash", "longdashdot", or "solid") will not work in SLD, but
      *     most SLD patterns will render correctly in OpenLayers.
+     * 
+     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
      */
-    strokeDashstyle: null,
 
     /**
      * APIProperty: fillColor
      * {String} RGB hex fill color (e.g. "#ff0000" for red).
+     * 
+     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
      */
-    fillColor: null,
     
     /**
      * APIProperty: fillOpacity
      * {Number} Fill opacity (0-1).
+     * 
+     * No default set here.  Use OpenLayers.Renderer.defaultRenderer for defaults.
      */
-    fillOpacity: null, 
 
     /**
      * Constructor: OpenLayers.Symbolizer.Polygon