Codechange: move tick-counter into TimerGameTick (#10712)

src/timer/timer_game_calendar.cpp

@@ -67,8 +67,6 @@ void TimerManager<TimerGameCalendar>::Elapsed(TimerGameCalendar::TElapsed delta)
 {
 	assert(delta == 1);
 
-	_tick_counter++;
-
 	if (_game_mode == GM_MENU) return;
 
 	TimerGameCalendar::date_fract++;

src/timer/timer_game_tick.cpp

@@ -16,6 +16,8 @@
 
 #include "safeguards.h"
 
+uint64 TimerGameTick::counter = 0;
+
 template<>
 void IntervalTimer<TimerGameTick>::Elapsed(TimerGameTick::TElapsed delta)
 {
@@ -51,6 +53,8 @@ void TimeoutTimer<TimerGameTick>::Elapsed(TimerGameTick::TElapsed delta)
 template<>
 void TimerManager<TimerGameTick>::Elapsed(TimerGameTick::TElapsed delta)
 {
+	TimerGameTick::counter++;
+
 	for (auto timer : TimerManager<TimerGameTick>::GetTimers()) {
 		timer->Elapsed(delta);
 	}

src/timer/timer_game_tick.h

@@ -29,6 +29,8 @@ public:
 	struct TStorage {
 		uint elapsed;
 	};
+
+	static uint64 counter; ///< Monotonic counter, in ticks, since start of game.
 };
 
 #endif /* TIMER_GAME_TICK_H */