Msgpack test fix

Author: ludamad

include/msgpack/sysdep.hpp

@@ -143,7 +143,7 @@
 #   if defined(_byteswap_uint64) || (defined(_MSC_VER) && _MSC_VER >= 1400)
 #        define _msgpack_be64(x) (_byteswap_uint64((uint64_t)x))
 #   elif defined(bswap_64)
-#        define _msgpack_be64(x) bswap_64(uint64_t)x)
+#        define _msgpack_be64(x) bswap_64((uint64_t)x)
 #   elif defined(__DARWIN_OSSwapInt64)
 #        define _msgpack_be64(x) __DARWIN_OSSwapInt64(x)
 #   else