Fix deque.hpp atomics bug introduced in refactor

rt/include/typon/fundamental/deque.hpp

@@ -64,23 +64,24 @@ namespace typon::fdt::lock_free
       _bottom.store(bottom, relaxed);
       std::atomic_thread_fence(seq_cst);
       u64 top = _top.load(relaxed);
-      if (top > bottom)
+      pop_type x { Empty };
+      if (top <= bottom)
       {
-        _bottom.store(top, relaxed);
-        return { Empty };
-      }
-      T x = array->get(bottom);
-      if (top < bottom)
-      {
-        return { x };
+        x = array->get(bottom);
+        if (top == bottom)
+        {
+          if (!_top.compare_exchange_strong(top, top + 1, seq_cst, relaxed))
+          {
+            x = { Empty };
+          }
+          _bottom.store(bottom + 1, relaxed);
+        }
       }
-      bool win = _top.compare_exchange_strong(top, top + 1, seq_cst, relaxed);
-      _bottom.store(top + 1, relaxed);
-      if (win)
+      else
       {
-        return { x };
+        _bottom.store(bottom + 1, relaxed);
       }
-      return { Empty };
+      return x;
     }
 
     pop_type steal() noexcept