Merge pull request TheWidlarzGroup#1246 from niklassaers/master

Instead of crashing, show a warning and return

(rebased from commit f69231f)

Author: cobarx

ios/Video/RCTVideo.m

@@ -743,6 +743,10 @@ - (void)playerItemForSource:(NSDictionary *)source
   NSString *audioUri = [audio objectForKey:@"uri"]; // ZL
   uri = @"http://192.168.2.228:8987/piss.mp4"; // ZL
   NSString *type = [source objectForKey:@"type"];
+  if (!uri || [uri isEqualToString:@""]) {
+    DebugLog(@"Could not find video URL in source '%@'", source);
+    return;
+  }
 
   NSURL *url = isNetwork || isAsset
     ? [NSURL URLWithString:uri]