message: Fix bug in DataCollection::SetCompression
diff: @@ -165,7 +165,7 @@ void DataCollection::SetFormat(int fmt)
  void DataCollection::SetCompression(bool comp)
  {
  compression = comp;
  -#ifdef MFEM_USE_GZSTREAM
  +#ifndef MFEM_USE_GZSTREAM
  MFEM_ASSERT(!compression, "GZStream not enabled in MFEM build.");
  #endif
  }
  