Avoid VML rendering issues with zero area inner rings. We don't actually do an expensive area calculation, but just make sure that we have at least three distinct points. This version is slightly different from Tim's previous patch: it compares the VML path components rathter than the geometry components, which is less expensive and more reliable (because the VML path uses integers). p=tschaub,me r=me (closes #2876)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10837 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/Renderer/VML.html

@@ -305,7 +305,7 @@
             return;
         }
         
-        t.plan(2);
+        t.plan(3);
         
         var r = new OpenLayers.Renderer.VML(document.body);
         r.offset = {x: 0, y: 0};
@@ -318,30 +318,16 @@
         
         var node = document.createElement('div');
         
-        var linearRing = {
-            components: [{
-                x: 1,
-                y: 2
-            },{
-                x: 3,
-                y: 4
-            }]
-        };
-        var linearRing2 = {
-            components: [{
-                x: 5,
-                y: 6
-            },{
-                x: 7,
-                y: 8
-            }]
-        };
-        var geometry = {
-            components: [linearRing, linearRing2]
-        };
+        var geometry = OpenLayers.Geometry.fromWKT(
+            "POLYGON((1 2, 3 4), (5 6, 7 8))"
+        );
         r.drawPolygon(node, geometry, true);
         t.ok(g_SetNodeDimension, "setNodeDimension is called");
-        t.eq(node.path, "m 2,4 l 6,8 x m 10,12 l 14,16 x e", "path attribute is correct");
+        t.eq(node.path, "m 2,4 l 6,8 2,4 x m 10,12 l 14,16 10,12 e", "path attribute is correct - inner ring has no area and is not closed");
+
+        geometry.components[1].addComponent(new OpenLayers.Geometry.Point(8, 7));
+        r.drawPolygon(node, geometry, true);
+        t.eq(node.path, "m 2,4 l 6,8 2,4 x m 10,12 l 14,16 16,14 10,12 x e", "path attribute is correct - inner ring has an area and is closed");        
     }
     
     function test_VML_drawrectangle(t) {