make enable-log-linecount independent of -filecount

You should be able to independently switch file and line count on and
off. This patch makes the code work like the documentation suggests: no
dependency for line counts to be displayed only when file counts are.

Signed-off-by: Julius Plenz <plenz@cis.fu-berlin.de>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>