re PR fortran/16465 (parser chokes with ffixed-line-length-7)

re PR fortran/16465 (parser chokes with ffixed-line-length-7)

PR fortran/16465
* lang.opt (ffixed-line-length-none, ffixed-line-length-): New
options.
(ffixed-line-length-80, ffixed-line-length-132): Remove.
* options.c (gfc_handle_options): Deal with changed options.
* scanner.c (load_line): Change second arg to 'char **',
allocate if pointing to NULL. Keep track of buffer's length.
Adapt buffer size to overlong lines. Pad lines to full length
in fixed form.
(load_file): Adapt to new interface of load_line.

From-SVN: r84891