(svn r27178) -Fix [FS#5969]: Data race due to lazy initialisation of objects.

src/linkgraph/linkgraphschedule.h

@@ -51,8 +51,8 @@ protected:
 public:
 	/* This is a tick where not much else is happening, so a small lag might go unnoticed. */
 	static const uint SPAWN_JOIN_TICK = 21; ///< Tick when jobs are spawned or joined every day.
+	static LinkGraphSchedule instance;
 
-	static LinkGraphSchedule *Instance();
 	static void Run(void *j);
 	static void Clear();