message: avoid segfault
diff: @@ -382,6 +382,8 @@ extern void FFSFreeMarshalData(SstStream Stream)
  {
  /* reader side */
  struct FFSReaderMarshalBase *Info = Stream->ReaderMarshalData;
  + if (Info)
  + {
  for (int i = 0; i < Stream->WriterCohortSize; i++)
  {
  if (Info->WriterInfo[i].RawBuffer)
  @@ -414,6 +416,7 @@ extern void FFSFreeMarshalData(SstStream Stream)
  Stream->ReaderMarshalData = NULL;
  }
  }
  +}
  #if !defined(ADIOS2_HAVE_ZFP)
  #define ZFPcompressionPossible(Type, DimCount) 0
  