address test failure

fdbserver/art.h

@@ -20,6 +20,7 @@
 
 
 #include <stdint.h>
+#include "fdbclient/FDBTypes.h"
 #include "flow/Arena.h"
 #include "flow/Platform.h"
 
@@ -50,7 +51,7 @@ struct art_tree {
 //#define ART_IS_LEAF(x) ( (*((ART_NODE_TYPE*)x) == ART_LEAF))
     template<class T>
     static inline bool ART_IS_LEAF(T const& x) {
-        return reinterpret_cast<ART_NODE_TYPE const&>(x) == ART_LEAF;
+        return *((ART_NODE_TYPE*)x) == ART_LEAF;
     }
 
 #define ART_LEAF_RAW(x) ((art_leaf*)(x))