Fixed a crash when swiping between lists before fragment exists

astrid/src/com/todoroo/astrid/activity/TaskListActivity.java

@@ -403,10 +403,12 @@ public class TaskListActivity extends AstridActivity implements MainMenuListener
             setListsTitle(tlfPagerAdapter.getPageTitle(position).toString());
 
             TaskListFragment fragment = getTaskListFragment();
+            if (fragment != null) {
                 fragment.initiateAutomaticSync();
                 fragment.requestCommentCountUpdate();
             }
         }
+    }
 
     @Override
     public void onPageScrolled(int position, float positionOffset,