Qt: Fix crash when loading a game after stopping GDB server

CHANGES

@@ -46,6 +46,7 @@ Bugfixes:
  - Qt: Fix crash when starting GDB stub after closing a game
  - Qt: Fix patch loading while a game is running
  - Util: Fix sockets on Windows
+ - Qt: Fix crash when loading a game after stopping GDB server
 Misc:
  - GBA Audio: Change internal audio sample buffer from 32-bit to 16-bit samples
  - GBA Memory: Simplify memory API and use fixed bus width

src/platform/qt/GDBController.cpp

@@ -43,14 +43,16 @@ void GDBController::attach() {
 	if (m_gameController->isLoaded()) {
 		ARMDebuggerEnter(&m_gdbStub.d, DEBUGGER_ENTER_ATTACHED, 0);
 	} else {
-		connect(m_gameController, &GameController::gameStarted, [this] () {
-			disconnect(m_gameController);
+		QObject::disconnect(m_autoattach);
+		m_autoattach = connect(m_gameController, &GameController::gameStarted, [this] () {
+			QObject::disconnect(m_autoattach);
 			ARMDebuggerEnter(&m_gdbStub.d, DEBUGGER_ENTER_ATTACHED, 0);
 		});
 	}
 }
 
 void GDBController::detach() {
+	QObject::disconnect(m_autoattach);
 	if (!isAttached()) {
 		return;
 	}

src/platform/qt/GDBController.h

@@ -45,6 +45,8 @@ private:
 
 	ushort m_port;
 	Address m_bindAddress;
+
+	QMetaObject::Connection m_autoattach;
 };
 
 }