Use correct CPP macro

Fixes gcc non-stats builds.

emper/strategies/laws/LawsDispatcher.hpp

@@ -9,7 +9,7 @@ class LawsDispatcher : public Dispatcher {
 private:
 
 	LawsStrategy& lawsStrategy
-#ifndef EMPER_SLEEP
+#ifndef EMPER_STATS
 	ATTR_UNUSED
 #endif
 	;

emper/strategies/laws/LawsScheduler.hpp

@@ -41,7 +41,7 @@ private:
 	WsQueue<QUEUE_SIZE>* mainThreadQueue;
 
 	LawsStrategy& lawsStrategy
-#ifndef EMPER_SLEEP
+#ifndef EMPER_STATS
 	ATTR_UNUSED
 #endif
 	;

emper/strategies/ws/WsScheduler.hpp

@@ -25,7 +25,7 @@ private:
 	WsQueue<QUEUE_SIZE>* mainThreadQueue;
 
 	WsStrategy& wsStrategy
-#ifndef EMPER_SLEEP
+#ifndef EMPER_STATS
 	ATTR_UNUSED
 #endif
 	;