put back two of the hacks of DB's that are actually needed (we need one

put back two of the hacks of DB's that are actually needed (we need one
since we can't add half a two-column character to converted in
display_string(), and we need the other to keep the "$" from spilling
over to the next line if the line contains two-column characters in the
right places)

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2232 35c25a1d-7b9e-4130-9fde-d3aeb78583b8