do not segfault on empty filename to escape.
do not segfault on empty filename to escape.

Avoid case where e_exec (and possible others) gives
e_util_filename_escape() a NULL parameter, actually another bug, but
does not hurt to safe guard this one.

By: manio



SVN revision: 40979

rvandegrift/e,tasn/enlightenment,tasn/enlightenment,tasn/enlightenment,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,FlorentRevest/Enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e