message: [Core] Don't send not-validated blocks
diff: @@ -5312,7 +5312,8 @@ void static ProcessGetData(CNode* pfrom)
  }
  }
  }
  - if (send) {
  + // Don't send not-validated blocks
  + if (send && (mi->second->nStatus & BLOCK_HAVE_DATA)) {
  // Send block from disk
  CBlock block;
  if (!ReadBlockFromDisk(block, (*mi).second))
  