Fixing some of the issues found by clang static analyzer.

Bug: webrtc:8737
Change-Id: Ib436449c493336e7c35a72a96dc88cccdbb5bbaf
Reviewed-on: https://webrtc-review.googlesource.com/39200
Commit-Queue: Peter Hanspers <peterhanspers@webrtc.org>
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21607}
diff --git a/sdk/objc/Framework/Classes/PeerConnection/RTCVideoTrack.mm b/sdk/objc/Framework/Classes/PeerConnection/RTCVideoTrack.mm
index 9fa6111..2f03110 100644
--- a/sdk/objc/Framework/Classes/PeerConnection/RTCVideoTrack.mm
+++ b/sdk/objc/Framework/Classes/PeerConnection/RTCVideoTrack.mm
@@ -32,7 +32,7 @@
   rtc::scoped_refptr<webrtc::VideoTrackInterface> track =
       factory.nativeFactory->CreateVideoTrack(nativeId,
                                               source.nativeVideoSource);
-  if ([self initWithNativeTrack:track type:RTCMediaStreamTrackTypeVideo]) {
+  if (self = [self initWithNativeTrack:track type:RTCMediaStreamTrackTypeVideo]) {
     _source = source;
   }
   return self;