Fix/missing trains at the end

@karnem a fix for the other issue with non-validated processed files.

At the end of INDEX/../first when there was missing trains I appended by zero as it was the case in count. but it seems that raw data had unlike the beginning of the first array which was filled with zeros in case of missing trains and having same no. of processed memory cells in missing trains at the middle. At the end it the first index of raw data in first is incremented by the number of processed memory cells and repeated till the end.