fix compile error 'intrinsic function not declared'
@@ -73,6 +73,7 @@ typedef unsigned char u8;
# endif
# elif defined(_MSC_VER)
# if _MSC_VER>=1300
+# include <stdlib.h>
# pragma intrinsic(_byteswap_uint64,_byteswap_ulong)
# define BSWAP8(x) _byteswap_uint64((u64)(x))
# define BSWAP4(x) _byteswap_ulong((u32)(x))
