lscpu: add missing initializers to struct lscpu_coldesc

warning: missing field 'is_abbr' initializer [-Wmissing-field-initializers]

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
libsmartcols: add explicit column flags default

Useful when initializing without any specific action in mind, or when
reseting flags later on.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
lslogins: add missing initializers to struct lslogins_coldesc

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
lslogins: use more narrow layout when initializing struct members

This is more readable for normal size (24x80) terminals, and has
advantage to make each of the field members to be version controlled in
separate lines.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>