Merge pull request #1246 from niklassaers/master

Instead of crashing, show a warning and return

Author: cobarx

ios/Video/RCTVideo.m

@@ -467,6 +467,10 @@ - (void)playerItemForSource:(NSDictionary *)source withCallback:(void(^)(AVPlaye
   bool shouldCache = [RCTConvert BOOL:[source objectForKey:@"shouldCache"]];
   NSString *uri = [source objectForKey:@"uri"];
   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]