Fix exiting the gallery view

* fixes nextcloud/server#2256

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

1 files changed, 5 insertions, 3 deletions

diff --git a/js/viewer.js b/js/viewer.js
index 18baf09..5959603 100755
--- a/js/viewer.js
+++ b/js/viewer.js
@@ -88,9 +88,11 @@ var videoViewer = {
 		});
 	},
 	hidePlayer : function() {
-		videoViewer.player.dispose();
-		videoViewer.player = false;
-		videoViewer.UI.hide();
+		if (videoViewer.player !== null && videoViewer.player !== false) {
+			videoViewer.player.dispose();
+			videoViewer.player = false;
+			videoViewer.UI.hide();
+		}
 	},
 	log : function(message){
 		console.log(message);