- Don't set layout-lines dirty when an invalid line is replaced by another invalid line.
- Don't set layout-lines dirty when an invalid line is replaced by another invalid line.

This fixes some serious performance problems with nvidia drivers when the editor window is big and contains a lot of invalid lines(The whole editor view was repainted with each inserted character).


svn path=/trunk/KDE/kdelibs/kate/; revision=812997

hlamer/kate,jfmcarreira/kate,DickJ/kate,cmacq2/kate,sandsmark/kate,hlamer/kate,sandsmark/kate,cmacq2/kate,hlamer/kate,hlamer/kate,DickJ/kate,sandsmark/kate,DickJ/kate,hlamer/kate,sandsmark/kate,hlamer/kate,hlamer/kate,jfmcarreira/kate,hlamer/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,cmacq2/kate,DickJ/kate