Include required headers

src/storm/utility/bitoperations.h

@@ -1,4 +1,6 @@
 #pragma once
+#include<cstddef>
+#include "storm/utility/macros.h"
 
 inline size_t smallestIntWithNBitsSet(size_t n) {
     static_assert(sizeof(size_t) == 8, "size_t has wrong size.");