'tmp' string is used for safe tokenizing, but it is not required after
getting all the widths in -w option. As 'tmp' string is obtained by strdup
call, the caller has to deallocate it to avoid memory leak.
Signed-off-by: Maxim Petrov <mmrmaximuzz@gmail.com> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>