check for headlines-spacer presence before querying infscroll on load

js/viewfeed.js

@@ -212,8 +212,8 @@ function headlines_callback2(transport, offset, background, infscroll_req) {
 
 		// if we have some more space in the buffer, why not try to fill it
 
-		if (!_infscroll_disable && $("headlines-spacer").offsetTop <
+		if (!_infscroll_disable && $("headlines-spacer") &&
-				$("headlines-frame").offsetHeight) {
+				$("headlines-spacer").offsetTop < $("headlines-frame").offsetHeight) {
 
 			window.setTimeout(function() {
 				loadMoreHeadlines();