making clearMouseCache work when document.body is not ready, which fixes a regression. r=bartvde (closes #3189)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11730 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Events.js

@@ -860,10 +860,9 @@ OpenLayers.Events = OpenLayers.Class({
         // returns incorrect offsets. So our best bet is to not invalidate the
         // offsets once we have them, and hope that the page was not scrolled
         // when we did the initial calculation.
-        if (!((document.body.scrollTop != 0 ||
+        var body = document.body;
-                                document.body.scrollLeft != 0) &&
+        if (body && !((body.scrollTop != 0 || body.scrollLeft != 0) &&
-                                navigator.userAgent.match(/iPhone/i))) {
+                                    navigator.userAgent.match(/iPhone/i))) {
-            OpenLayers.Console.log("clear");
             this.element.offsets = null;
         }
     },      

tests/Map.html

@@ -1593,8 +1593,20 @@
         
     }
 
+    // test if we can call updateSize before document.body is ready. updateOk
+    // is tested in the test_updateSize function below
+    var earlyMap = new OpenLayers.Map();
+    var updateOk;
+    try {
+      earlyMap.updateSize();
+      updateOk = true;
+    } catch(e) {}
+    earlyMap.destroy();
     function test_updateSize(t) {
-        t.plan(2);
+        t.plan(3);
+
+        // checking updateSize from outside this test function (see above)
+        t.ok(updateOk, "updateSize works before document.body is ready");
 
         var map, moveToCnt, size;