ALF-9923 Share needs permissions details for wiki pages even when we have yet to do a write to the container, use the site permissions for that case

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@30093 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/web/scripts/wiki/WikiPageGet.java

@@ -65,6 +65,13 @@ public class WikiPageGet extends AbstractWikiWebScript
          NodeRef container = siteService.getContainer(
                site.getShortName(), WikiServiceImpl.WIKI_COMPONENT
          );
+         // If there's no container yet, the site will do for permissions
+         if(container == null)
+         {
+            container = site.getNodeRef();
+         }
+         
+         // Record these
          model.put("container", container);
          model.put("error", message);