From aedbd6dfe482a0ff858cb4c97dc9ff963c76894f Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 1 May 2017 11:03:56 +0300
Subject: [PATCH] Fix assertion violation when editing GIF / video.

If a GIF / video had no thumbnail the _animated flag was removed.
---
 Telegram/SourceFiles/boxes/send_files_box.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/boxes/send_files_box.cpp b/Telegram/SourceFiles/boxes/send_files_box.cpp
index 89354275ef..39c4d53bec 100644
--- a/Telegram/SourceFiles/boxes/send_files_box.cpp
+++ b/Telegram/SourceFiles/boxes/send_files_box.cpp
@@ -490,8 +490,7 @@ EditCaptionBox::EditCaptionBox(QWidget*, HistoryMedia *media, FullMsgId msgId) :
 	}
 	caption = media->getCaption().text;
 
-	if ((!_animated && (dimensions.isEmpty() || doc)) || image->isNull()) {
-		_animated = false;
+	if (!_animated && (dimensions.isEmpty() || doc || image->isNull())) {
 		if (image->isNull()) {
 			_thumbw = 0;
 		} else {