Micro optimization

src/main/kotlin/ru/dbotthepony/mc/otm/core/util/TickList.kt

@@ -93,19 +93,26 @@ class TickList {
 			ticker.tick()
 		}
 
-		always.addAll(alwaysValveTime)
+		if (alwaysValveTime.isNotEmpty()) {
-		alwaysValveTime.clear()
+			always.addAll(alwaysValveTime)
-
+			alwaysValveTime.clear()
-		for (ticker in conditionalValveTime) {
-			conditional.addFirst(ticker)
 		}
 
-		for (ticker in onceValveTime) {
+		if (conditionalValveTime.isNotEmpty()) {
-			once.addFirst(ticker)
+			for (ticker in conditionalValveTime) {
+				conditional.addFirst(ticker)
+			}
+
+			conditionalValveTime.clear()
 		}
 
-		conditionalValveTime.clear()
+		if (onceValveTime.isNotEmpty()) {
-		onceValveTime.clear()
+			for (ticker in onceValveTime) {
+				once.addFirst(ticker)
+			}
+
+			onceValveTime.clear()
+		}
 
 		inTicker = false
 	}