Logic error in http2_connection.dart

[adrianflutur]

Hello, today I stumbled upon this while I was reading the code inside src/client/http2_connection.dart:

https://github.com/grpc/grpc-dart/blob/c982597faea6079712182b663779bf3098d25578/lib/src/client/http2_connection.dart#L273

I'm not sure how much this has impacted the average user as I can tell for myself that I didn't notice any anomalies happening (so far). I guess it should be addressed though, unless, of course, that's some neat quantum superposition thing going on there 😁

Thanks

[krjw-eyev]

Fixed by #522