Fix for NPE that user reported, also made calendar picking logic more robust.

astrid/src-legacy/com/timsu/astrid/data/tag/TagController.java

@@ -320,7 +320,9 @@ public class TagController extends AbstractController {
     /** Closes database resource */
     @Override
     public void close() {
-        tagDatabase.close();
-        tagToTaskMapDatabase.close();
+        if(tagDatabase != null)
+            tagDatabase.close();
+        if(tagToTaskMapDatabase != null)
+            tagToTaskMapDatabase.close();
     }
 }

astrid/src-legacy/com/timsu/astrid/utilities/Calendars.java

@@ -86,7 +86,7 @@ public class Calendars {
 
 		int currentSettingIndex = -1;
 
-		if (c == null) {
+		if (c == null || c.getCount() == 0) {
 			// Something went wrong when querying calendars
 			// Let's keep the "Astrid default" only.
 			listPreference
@@ -104,7 +104,6 @@ public class Calendars {
 		String[] entries = new String[calendarCount];
 		String[] entryValues = new String[calendarCount];
 
-
 		// Iterate calendars one by one, and fill up the list preference
 		try {
 			int row = 0;
@@ -135,6 +134,8 @@ public class Calendars {
 						.getString(R.string.prefs_defaultCalendar_default) });
 				listPreference.setValueIndex(0);
 				listPreference.setEnabled(true);
+			} else if(currentSettingIndex >= entryValues.length) {
+			    currentSettingIndex = 0;
 			}
 
 			listPreference.setEntries(entries);