Fix warning C4164 in MSVC.
Fix: crypto\whrlpool\wp_block.c(90) : warning C4164: '_rotl64' : intrinsic function not declared.
Fixes
@@ -87,6 +87,7 @@ typedef unsigned long long u64;
#ifndef PEDANTIC
# if defined(_MSC_VER)
# if defined(_WIN64) /* applies to both IA-64 and AMD64 */
+# include <stdlib.h>
# pragma intrinsic(_rotl64)
# define ROTATE(a,n) _rotl64((a),n)
# endif
