broadening stroke width in symbol edge hit detection test to lessen sensitivity to browser antialiasing differences

tests/Renderer/Canvas.html

@@ -308,8 +308,8 @@
             new OpenLayers.Feature.Vector(
                 new OpenLayers.Geometry.Point(80, 0), {}, {
                     graphicName: "square",
-                    pointRadius: 5,
-                    strokeWidth: 3,
+                    pointRadius: 8,
+                    strokeWidth: 4,
                     fillColor: "red",
                     fillOpacity: 0.5,
                     strokeColor: "blue",
@@ -341,9 +341,9 @@
         }, {
             msg: "inside symbol", x: 80, y: 0, id: layer.features[3].id
         }, {
-            msg: "outside symbol interior, inside symbol edge", x: 86, y: 6, id: layer.features[3].id
+            msg: "outside symbol interior, inside symbol edge", x: 90, y: 8, id: layer.features[3].id
         }, {
-            msg: "outside symbol", x: 90, y: 0, id: null
+            msg: "outside symbol", x: 94, y: 0, id: null
         }];
 
         function px(x, y) {