[textlayout] Do not enter infinite loop when line rect is not valid

Authored by anthonyfieroni on Dec 30 2017, 6:32 AM.

Description

[textlayout] Do not enter infinite loop when line rect is not valid

Differential Revision: https://phabricator.kde.org/D9497

Signed-off-by: Anthony Fieroni <bvbfan@abv.bg>

Details