message: Fix variable shadowing in wallet/db.cpp
  wallet/db.cpp:370:33: warning: declaration shadows a local variable [-Wshadow]
  int ret = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT);
  ^
  wallet/db.cpp:352:25: note: previous declaration is here
  int ret = pdbCopy->open(nullptr, // Txn pointer
  ^
diff: @@ -367,13 +367,13 @@ bool CDB::Rewrite(const string &strFile, const char *pszSkip)
  {
  CDataStream ssKey(SER_DISK, CLIENT_VERSION);
  CDataStream ssValue(SER_DISK, CLIENT_VERSION);
  - int ret = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT);
  - if (ret == DB_NOTFOUND)
  + int ret3 = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT);
  + if (ret3 == DB_NOTFOUND)
  {
  pcursor->close();
  break;
  }
  - else if (ret != 0)
  + else if (ret3 != 0)
  {
  pcursor->close();
  fSuccess = false;
  