Ignore -Wattributes

It appears that gcc does not support __attribute__((unused)) on class
members and thus emits an warning when he finds it.

emper/strategies/laws/LawsDispatcher.hpp

@@ -8,11 +8,14 @@ class LawsDispatcher : public Dispatcher {
 
 private:
 
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wattributes"
 	LawsStrategy& lawsStrategy
 #ifndef EMPER_STATS
 	ATTR_UNUSED
 #endif
 	;
+	#pragma GCC diagnostic pop
 
 public:
 	LawsDispatcher(Runtime& runtime, LawsStrategy& lawsStrategy) : Dispatcher(runtime)

emper/strategies/laws/LawsScheduler.hpp

@@ -40,11 +40,14 @@ private:
 
 	WsQueue<QUEUE_SIZE>* mainThreadQueue;
 
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wattributes"
 	LawsStrategy& lawsStrategy
 #ifndef EMPER_STATS
 	ATTR_UNUSED
 #endif
 	;
+	#pragma GCC diagnostic pop
 
 public:
 

emper/strategies/ws/WsScheduler.hpp

@@ -24,11 +24,14 @@ private:
 
 	WsQueue<QUEUE_SIZE>* mainThreadQueue;
 
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wattributes"
 	WsStrategy& wsStrategy
 #ifndef EMPER_STATS
 	ATTR_UNUSED
 #endif
 	;
+	#pragma GCC diagnostic pop
 
 public: