message: Fix incorrect treating of height for sigma verification
diff: @@ -402,9 +402,9 @@ bool CheckSigmaTransaction(
  auto& consensus = ::Params().GetConsensus();
  // nHeight have special mode which value is INT_MAX so we need this.
  - int realHeight;
  + int realHeight = nHeight;
  - {
  + if (realHeight == INT_MAX) {
  LOCK(cs_main);
  realHeight = chainActive.Height();
  }
  