fixed 'unary minus operator applied to unsigned type, result still unsigned' warning
fixed 'unary minus operator applied to unsigned type, result still unsigned' warning

svn path=/trunk/KDE/kdelibs/kate/; revision=772463

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