Fix pull to refresh for the cards view

Clover/app/src/main/java/org/floens/chan/ui/layout/ThreadListLayout.java

@@ -264,22 +264,20 @@ public class ThreadListLayout extends LinearLayout implements ReplyLayout.ReplyL
             return true;
         }
 
-        View top = recyclerView.getChildAt(0);
-        if (top != null) {
-
         switch (postViewMode) {
             case LIST:
-                    if (top.getTop() == 0 && ((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition() == 0) {
+                if (((LinearLayoutManager) layoutManager).findFirstVisibleItemPosition() == 0) {
-                        return false;
+                    View top = layoutManager.findViewByPosition(0);
+                    return top.getTop() != 0;
                 }
                 break;
             case CARD:
-                    if (top.getTop() == 0 && ((GridLayoutManager) layoutManager).findFirstVisibleItemPosition() == 0) {
+                if (((GridLayoutManager) layoutManager).findFirstVisibleItemPosition() == 0) {
-                        return false;
+                    View top = layoutManager.findViewByPosition(0);
+                    return top.getTop() != dp(8); // 4dp for the cards, 4dp for this layout
                 }
                 break;
         }
-        }
         return true;
     }