for consistency, revert handling of cases where a search string and a

for consistency, revert handling of cases where a search string and a
match to it are not the same length in bytes, since the same technique
can't be made to work with tab completion matches

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2893 35c25a1d-7b9e-4130-9fde-d3aeb78583b8