PEGASUS: Fix possible timer "skip" when resuming

pause/resume need to treat things a bit differently from the normal setRate function. This caused a jump in a timer when resuming from the pause menu in certain cases, though not all the time.

Regression from b50cac6, which was part of the fix for the lid animations.

engines/pegasus/timers.cpp

@@ -115,15 +115,15 @@ void TimeBase::stop() {
 void TimeBase::pause() {
 	if (isRunning() && !_paused) {
 		_pausedRate = getRate();
-		stop();
+		_rate = 0;
 		_paused = true;
 		_pauseStart = g_system->getMillis();
 	}
 }
 
 void TimeBase::resume() {
 	if (_paused) {
-		setRate(_pausedRate);
+		_rate = _pausedRate;
 		_paused = false;
 
 		if (isRunning())