Fixed a potential null pointer in task adapter

astrid/src/com/todoroo/astrid/adapter/TaskAdapter.java

@@ -355,7 +355,6 @@ public class TaskAdapter extends CursorAdapter implements Filterable {
     public synchronized void setFieldContentsAndVisibility(View view) {
         ViewHolder viewHolder = (ViewHolder)view.getTag();
         Task task = viewHolder.task;
-
         if (Preferences.getBoolean(R.string.p_allowCompressedTaskRows, false)) {
             viewHolder.rowBody.setMinimumHeight(0);
         } else {
@@ -377,6 +376,8 @@ public class TaskAdapter extends CursorAdapter implements Filterable {
         // due date / completion date
         float dueDateTextWidth = 0;
         final TextView dueDateView = viewHolder.dueDate; {
+            Activity activity = fragment.getActivity();
+            if (activity != null) {
                 if(!task.isCompleted() && task.hasDueDate()) {
                     long dueDate = task.getValue(Task.DUE_DATE);
                     if(dueDate > DateUtilities.now())
@@ -397,6 +398,7 @@ public class TaskAdapter extends CursorAdapter implements Filterable {
                     dueDateView.setVisibility(View.GONE);
                 }
             }
+        }
 
         // complete box
         final CheckableImageView completeBox = viewHolder.completeBox; {