Simplify timer logic.

We aren't using `i`, so we can iterate over the array normally. And there are no longer null entries, so we don't have to check for those.

src/lime/_internal/backend/native/NativeApplication.hx

@@ -94,10 +94,9 @@ class NativeApplication
 		if (pauseTimer > -1)
 		{
 			var offset = System.getTimer() - pauseTimer;
-			for (i in 0...Timer.sRunningTimers.length)
+			for (timer in Timer.sRunningTimers)
 			{
-				var timer = Timer.sRunningTimers[i];
-				if (timer != null && timer.mRunning) timer.mFireAt += offset;
+				if (timer.mRunning) timer.mFireAt += offset;
 			}
 			pauseTimer = -1;
 		}
@@ -579,14 +578,11 @@ class NativeApplication
 		if (Timer.sRunningTimers.length > 0)
 		{
 			var currentTime = System.getTimer();
-			var foundNull = false;
-			var timer;
+			var foundStopped = false;
 
-			for (i in 0...Timer.sRunningTimers.length)
+			for (timer in Timer.sRunningTimers)
 			{
-				timer = Timer.sRunningTimers[i];
-
-				if (timer != null && timer.mRunning)
+				if (timer.mRunning)
 				{
 					if (currentTime >= timer.mFireAt)
 					{
@@ -596,15 +592,15 @@ class NativeApplication
 				}
 				else
 				{
-					foundNull = true;
+					foundStopped = true;
 				}
 			}
 
-			if (foundNull)
+			if (foundStopped)
 			{
 				Timer.sRunningTimers = Timer.sRunningTimers.filter(function(val)
 				{
-					return val != null && val.mRunning;
+					return val.mRunning;
 				});
 			}
 		}