From a8325735a3ca24f004866512b32d3ec8c303e366 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Tue, 14 Feb 2017 22:10:24 +0100
Subject: [PATCH] Fixed NPE from DocumentFileManager.isSticker. #30.

---
 .../telegram_backup/mediafilemanager/DocumentFileManager.java    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/DocumentFileManager.java b/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/DocumentFileManager.java
index 143a9b5..0559cc7 100644
--- a/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/DocumentFileManager.java
+++ b/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/DocumentFileManager.java
@@ -60,6 +60,7 @@ public class DocumentFileManager extends AbstractMediaFileManager {
 	
 	public boolean isSticker() {
 		TLDocumentAttributeSticker sticker = null;
+		if (this.isEmpty || doc==null) return false;
 		if (doc.getAttributes() != null) for(TLAbsDocumentAttribute attr : doc.getAttributes()) {
 			if (attr instanceof TLDocumentAttributeSticker) {
 				sticker = (TLDocumentAttributeSticker)attr;