QmlDesigner.qmlPuppet: set QDataStream version

We already did some refactoring on this part in master.

Change-Id: Ia878afa3aa773d2496343e052ababf30da9351d7
Reviewed-by: Marco Bubke <marco.bubke@digia.com>

share/qtcreator/qml/qmlpuppet/instances/nodeinstanceclientproxy.cpp

@@ -92,6 +92,8 @@ void NodeInstanceClientProxy::writeCommand(const QVariant &command)
 {
     QByteArray block;
     QDataStream out(&block, QIODevice::WriteOnly);
+    out.setVersion(QDataStream::Qt_4_8);
+
     out << quint32(0);
     out << quint32(m_writeCommandCounter);
     m_writeCommandCounter++;
@@ -163,6 +165,7 @@ void NodeInstanceClientProxy::readDataStream()
             break;
 
         QDataStream in(m_socket);
+        in.setVersion(QDataStream::Qt_4_8);
 
         if (m_blockSize == 0) {
             in >> m_blockSize;