Fixed column finding without all columns visible
Fixed column finding without all columns visible

Fixed a bug where the column returned when all columns were not
visible would be less than 1.

Consolidated the calculating of the column index into a single function.

Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

bigzz/trace-cmd,bigzz/trace-cmd