Fix for Astrid crash when using timers. Version bump

astrid/AndroidManifest.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.timsu.astrid"
-          android:versionName="3.6.3"
-          android:versionCode="169">
+          android:versionName="3.6.4"
+          android:versionCode="170">
           
   <!-- widgets, alarms, and services will break if Astrid is installed on SD card -->
   <!--    android:installLocation="internalOnly"> -->

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

@@ -308,7 +308,7 @@ public class TaskAdapter extends CursorAdapter implements Filterable {
         // complete box
         final CheckBox completeBox = viewHolder.completeBox; {
             // show item as completed if it was recently checked
-            if(completedItems.containsKey(task.getId())) {
+            if(completedItems.get(task.getId()) != null) {
                 task.setValue(Task.COMPLETION_DATE,
                         completedItems.get(task.getId()) ? DateUtilities.now() : 0);
             }