The cmd_line field of the start_info struct is not guaranteed to be NUL-terminated, even though it is intended to contain a NUL-terminated string. Add a warning about this in a comment so future consumers of this field know to check it for a NUL terminator before using it. Signed-off-by: Aaron Rainbolt <arraybolt3@gmail.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>