refactor: Fix "error C2248: cannot access private member" on MSVC

src/util/bitdeque.h

@@ -14,18 +14,17 @@
 
 /** Class that mimics std::deque<bool>, but with std::vector<bool>'s bit packing.
  *
- * BlobSize selects the (minimum) number of bits that are allocated at once.
+ * BITS_PER_WORD selects the (minimum) number of bits that are allocated at once.
  * Larger values reduce the asymptotic memory usage overhead, at the cost of
  * needing larger up-front allocations. The default is 4096 bytes.
  */
-template<int BlobSize = 4096 * 8>
+template<int BITS_PER_WORD = 4096 * 8>
 class bitdeque
 {
     // Internal definitions
-    using word_type = std::bitset<BlobSize>;
+    using word_type = std::bitset<BITS_PER_WORD>;
     using deque_type = std::deque<word_type>;
-    static_assert(BlobSize > 0);
-    static constexpr int BITS_PER_WORD = BlobSize;
+    static_assert(BITS_PER_WORD > 0);
 
     // Forward and friend declarations of iterator types.
     template<bool Const> class Iterator;