Fix bug 768207 - Make the cache checkbox default-on in the new calendar dialog. r=redDragon

calendar/resources/content/calendarCreation.js

@@ -82,8 +82,10 @@ function onSelectProvider(type) {
         cache.checked = true;
         cache.disabled = true;
     } else {
-        cache.checked = cache.oldValue || false;
-        cache.oldValue = null;
+        if (cache.oldValue !== undefined) {
+            cache.checked = cache.oldValue;
+            cache.oldValue = undefined;
+        }
         cache.disabled = false;
     }
 }

calendar/resources/content/calendarCreation.xul

@@ -71,6 +71,7 @@
                 <row>
                      <label/>
                      <checkbox id="cache"
+                               checked="true"
                                label="&calendarproperties.cache3.label;"/>
                 </row>
                 <notificationbox id="location-notifications" flex="1"/>