Updated UTXOCache memSize estimate to take into account latest changes

It was underestimating the memory consumed by 32 bytes per shunspent
entry in the UTXOCache class. The new memory requirements are as of our
latest 1.9.0 changes where we just store the final value we plan to
write to DB in serialized form into the unordered map directly for
shunspents.

src/Storage.cpp

@@ -1163,7 +1163,7 @@ class Storage::UTXOCache
     ShunspentRmVec shunspentRms; ///< queued deletions, not yet deleted from DB
 
     static constexpr size_t ShunspentTableNodeSize = sizeof(ShunspentTable::value_type) + HashLen + CompactTXO::minSize()
-                                                     + Util::qByteArrayPvtDataSize();
+                                                     + Util::qByteArrayPvtDataSize()*size_t{2u} + sizeof(int64_t); // not guaranteed accurate: doesn't take possible tokenData serialization into account
     static constexpr size_t ShunspentRmVecNodeSize = sizeof(ShunspentRmVec::value_type) + HashLen + CompactTXO::minSize()
                                                      + Util::qByteArrayPvtDataSize();