joinp --infer-len=0 data type issue

[datatraveller1]

With the qsv joinp --infer-len=0 command, some data types of the output file (-o joined.csv) seem to get changed.
E.g. there is a column (not part of the join columns) PT with original values 0101. The output column PT values get changed to 101. However, I don't want the output column content to be changed.
@jqnatividad If you need more information, I'll write an issue report tomorrow or latest this weekend. Thank you!

[datatraveller1]

See here, closed with #2405