Keith, while I sympathize with the request, I am going to agree with the others and close this.  As I see it, csv exists to solve a particular problem.  We want a printable file of records and text fields with visible field and record separators, but we may want to use those separators within fields.  So we add a quote character as an auxiliary delimiter and ignore separators within quotes.  Files with mismatched quotes are broken.

You are willing to append a quote, even though that may be the wrong thing to do.  Alternatives include: skip the line, perhaps after logging it; delete the last quote to make the count even; provide a more sophisticated auto-editing function; or display a GUI entry box initialized to the bad line and request the user to edit until quotes are matched.  I don't think we should pick any of these.