New minimumSymbolizer object on Renderer.Elements, which defines only those properties that are needed to ensure that nothing breaks. r=tschaub (closes #1345)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@6317 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Renderer/Elements.js

@@ -41,6 +41,17 @@ OpenLayers.Renderer.Elements = OpenLayers.Class(OpenLayers.Renderer, {
      */    
     xmlns: null,
     
+    /**
+     * Property: minimumSymbolizer
+     * {Object}
+     */
+    minimumSymbolizer: {
+        strokeLinecap: "round",
+        strokeOpacity: 1,
+        fillOpacity: 1,
+        pointRadius: 0
+    },
+    
     /**
      * Constructor: OpenLayers.Renderer.Elements
      * 
@@ -161,6 +172,7 @@ OpenLayers.Renderer.Elements = OpenLayers.Class(OpenLayers.Renderer, {
      */
     drawGeometryNode: function(node, geometry, style) {
         style = style || node._style;
+        OpenLayers.Util.applyDefaults(style, this.minimumSymbolizer);
 
         var options = {
             'isFilled': true,