Not bothering to put back the cursor in the edit window, as it is off

Not bothering to put back the cursor in the edit window, as it is off
anyway, and it will be placed back when it's needed: in the main loop.

This prevents a segfault laid bare by r5763: when trying, at startup,
to open a directory, there really is no open buffer yet.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5766 35c25a1d-7b9e-4130-9fde-d3aeb78583b8