QWebSocket: check correct variable in if-statement

It's _usually_ correct, but if all protocols have been filtered
out then it will be an empty string.

Change-Id: I3aa3221b7e36cfd253cd1152b13e57183bf4f905
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
(cherry picked from commit 0fbd3decd0dd694063edd06a174f137ec30d3741)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/websockets/qwebsocket_p.cpp b/src/websockets/qwebsocket_p.cpp
index 1539916..18efa59 100644
--- a/src/websockets/qwebsocket_p.cpp
+++ b/src/websockets/qwebsocket_p.cpp
@@ -1269,7 +1269,7 @@ QString QWebSocketPrivate::createHandShakeRequest(QString resourceName,
         return validProtocols;
     }();
 
-    if (!protocols.isEmpty()) {
+    if (!validProtocols.isEmpty()) {
         handshakeRequest << QStringLiteral("Sec-WebSocket-Protocol: ")
                                 % validProtocols.join(QLatin1String(", "));
     }