fix warning: comparison between signed and unsigned
fix warning: comparison between signed and unsigned

svn path=/trunk/kdelibs/kate/; revision=153400

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