Fixed issue #2171: blame setting 'detect moved or copied line' does not work for the case 'from modified files'

The blame setting 'detect moved or copied lines' does now set the correct value for the case 'from modified files'

Signed-off-by: Martin Strauß <MStrauss@MuellerBBM-vas.de>
Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>