quic: fix crash in onStreamClose

onStreamClose could crash, if this[kOwner]
was not set.

Signed-off-by: Marten Richter <marten.richter@freenet.de>

Author: martenrichter

lib/internal/quic/quic.js

@@ -962,9 +962,10 @@ setCallbacks({
     // Called when the stream C++ handle has been closed. The error is
     // either undefined (clean close) or a raw array [type, code, reason]
     // from QuicError::ToV8Value. Convert to a proper Node.js Error.
+    if (!this[kOwner]) return;
     if (error !== undefined) {
       error = convertQuicError(error);
-    } else if (this[kOwner] && !this[kOwner].destroyed) {
+    } else if (!this[kOwner].destroyed) {
       // The stream is closing cleanly, but it may have been reset by the
       // peer (ReceiveStreamReset) or locally (resetStream). The C++ side
       // records the reset code in state.resetCode. If set, surface the