Qt: Fix memory leak in LogController

src/platform/qt/LogController.cpp

@@ -25,6 +25,10 @@ LogController::LogController(int levels, QObject* parent)
 	}
 }
 
+LogController::~LogController() {
+	mLogFilterDeinit(&m_filter);
+}
+
 LogController::Stream LogController::operator()(int category, int level) {
 	return Stream(this, category, level);
 }

src/platform/qt/LogController.h

@@ -35,6 +35,7 @@ private:
 
 public:
 	LogController(int levels, QObject* parent = nullptr);
+	~LogController();
 
 	int levels() const { return m_filter.defaultLevels; }
 	mLogFilter* filter() { return &m_filter; }