From e7337227fea2152920dfcecce9d6873f708f3041 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stanis=C5=82aw=20Chmiela?= <sjchmiela@gmail.com>
Date: Tue, 17 May 2016 09:40:58 +0200
Subject: [PATCH] Remove observer only if it has been registered

Happens if someone creates Video component, but doesn't set src to it.
---
 RCTVideo.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/RCTVideo.m b/RCTVideo.m
index 4fc9cf66..364560ed 100644
--- a/RCTVideo.m
+++ b/RCTVideo.m
@@ -675,8 +675,10 @@ static NSString *const playbackRate = @"rate";
 - (void)removeFromSuperview
 {
   [_player pause];
+  if (_playbackRateObserverRegistered) {
     [_player removeObserver:self forKeyPath:playbackRate];
     _playbackRateObserverRegistered = NO;
+  }
   _player = nil;
 
   [self removePlayerLayer];