v2.4.0: cleaned up various allocations that occurred every frame

SPD-classes/src/main/java/com/watabou/input/KeyEvent.java

@@ -62,6 +62,10 @@ public class KeyEvent {
 	}
 	
 	public static synchronized void processKeyEvents(){
+		if (keyEvents.isEmpty()) {
+			return;
+		}
+
 		for (KeyEvent k : keyEvents){
 			if (KeyBindings.getActionForKey(k) == GameAction.LEFT_CLICK){
 				Game.inputHandler.emulateTouch(ControllerHandler.CONTROLLER_POINTER_ID, PointerEvent.LEFT, k.pressed);

SPD-classes/src/main/java/com/watabou/input/PointerEvent.java

@@ -136,6 +136,10 @@ public class PointerEvent {
 	public static boolean clearKeyboardThisPress = true;
 	
 	public static synchronized void processPointerEvents(){
+		if (pointerEvents.isEmpty()){
+			return;
+		}
+
 		//handle any hover events separately first as we may need to add drag events
 		boolean hovered = false;
 		for (PointerEvent p : pointerEvents){

SPD-classes/src/main/java/com/watabou/input/ScrollEvent.java

@@ -62,6 +62,10 @@ public class ScrollEvent {
 	}
 	
 	public static synchronized void processScrollEvents(){
+		if (scrollEvents.isEmpty()) {
+			return;
+		}
+
 		for (ScrollEvent k : scrollEvents){
 			scrollSignal.dispatch(k);
 		}