(read_escape): `\ ' stands for nothing at all.

(read_escape): `\ ' stands for nothing at all.
(oblookup): Take args SIZE and SIZE_BYTE.  Callers changed.
(init_obarray, read1, make_symbol):
Pass new arg to make_pure_string.
(Fintern, oblookup, Fintern_soft, intern): Handle size_byte.
(dir_warning): Pass new arg to message_dolog.
(read1): PCH is now int *.
Declare ch as int.
(read0): Declare c as int.
(read_list): Declare ch as int.
(read0): Use Fmake_string not make_string.
(read1): When reading a string, maybe use make_unibyte_string.
(Fread_from_string): Convert string indices to/from bytes.