message: Don't instrument Data->DataSize if Data is NULL
diff: @@ -1456,6 +1456,7 @@ extern void SstInternalProvideTimestep(
  Md.Metadata = (SstData)LocalMetadata;
  Md.AttributeData = (SstData)AttributeData;
  Md.DP_TimestepInfo = DP_TimestepInfo;
  + if (Data)
  TAU_SAMPLE_COUNTER("Timestep local data size", Data->DataSize);
  TAU_SAMPLE_COUNTER("Timestep local metadata size", LocalMetadata->DataSize);
  TAU_START("Metadata Consolidation time in EndStep()");
  