Fix lack of typename.

Author: evoskuil

include/bitcoin/database/primitives/arrayhead.hpp

@@ -71,9 +71,9 @@ class arrayhead
     bool push(const Link& link, const Link& index) NOEXCEPT;
 
 private:
-    static_assert(std::atomic<Link::integer>::is_always_lock_free);
-    static constexpr auto size_ = Align ? sizeof(Link::integer) : Link::size;
     using integer = Link::integer;
+    static_assert(std::atomic<integer>::is_always_lock_free);
+    static constexpr auto size_ = Align ? sizeof(integer) : Link::size;
 
     // Body does not use padded link size.
     using body = manager<Link, system::data_array<zero>, Link::size>;

include/bitcoin/database/primitives/hashhead.hpp

@@ -65,9 +65,9 @@ class hashhead
     inline bool push(const Link& current, bytes& next, const Link& index) NOEXCEPT;
 
 private:
-    static_assert(std::atomic<Link::integer>::is_always_lock_free);
-    static constexpr auto size_ = Align ? sizeof(Link::integer) : Link::size;
     using integer = Link::integer;
+    static_assert(std::atomic<integer>::is_always_lock_free);
+    static constexpr auto size_ = Align ? sizeof(integer) : Link::size;
 
     template <size_t Bytes>
     static inline auto& to_array(memory::iterator it) NOEXCEPT