ProcessStartedPacket: Initialize processId

Change-Id: I052dcb251b59f6624ef90789fab604b768cd7150
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/launcherpackets.h

@@ -111,7 +111,7 @@ class ProcessStartedPacket : public LauncherPacket
 public:
     ProcessStartedPacket(quintptr token);
 
-    int processId;
+    int processId = 0;
 
 private:
     void doSerialize(QDataStream &stream) const override;