Merge pull request #49 from anhr/master

bug of update of database to version 5

Author: dexterbg

OpenVehicleApp/src/com/openvehicles/OVMS/ui/utils/Database.java

@@ -169,7 +169,7 @@ public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 
 				// copy to db:
 				for (int i=0; i < notifications.size(); i++) {
-					addNotificationInt(notifications.get(i));
+					addNotificationInt(notifications.get(i), db);
 				}
 				Log.d(TAG, String.format("Added %d notifications to table.", notifications.size()));
 
@@ -529,13 +529,18 @@ public void addNotification(NotificationData notificationData) {
 		open();
 		addNotificationInt(notificationData);
 	}
-
 	private void addNotificationInt(NotificationData notificationData) {
+		addNotificationInt(notificationData, db);
+	}
+	
+	private void addNotificationInt(NotificationData notificationData, SQLiteDatabase db) {
 		ContentValues contentValues = new ContentValues();
 		contentValues.put("nType", notificationData.Type);
 		contentValues.put("nTimestamp", isoDateTime.format(notificationData.Timestamp));
 		contentValues.put("nTitle", notificationData.Title);
 		contentValues.put("nMessage", notificationData.Message);
+		if(db == null)
+			throw new NullPointerException( "Open database first." );
 		db.insert("Notification", null, contentValues);
 	}