libsmartcols: remove ununsed assignment

Value stored to 'rc' is never read.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
lib/timeutils: fix memory leak

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
lib/pager: use names when referring to standard file descriptors

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