Valgrind: Fix build

Amends ec53435e04.

Change-Id: Iaee2b355a98bf92c94bd66a8a615befec08b11c3
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/valgrind/xmlprotocol/threadedparser.cpp

@@ -33,6 +33,8 @@ ThreadedParser::ThreadedParser(QObject *parent)
     : QObject(parent)
 {}
 
+ThreadedParser::~ThreadedParser() = default;
+
 bool ThreadedParser::isRunning() const
 {
     return m_parserThread ? m_parserThread->isRunning() : false;

src/plugins/valgrind/xmlprotocol/threadedparser.h

@@ -25,6 +25,7 @@ class ThreadedParser : public QObject
 
 public:
     explicit ThreadedParser(QObject *parent = nullptr);
+    ~ThreadedParser();
 
     /// interface additions relative to Parser because Parser is synchronous and this
     /// class parses asynchronously in a non-public secondary thread.