(Fencode_shift_jis_char):

(Fencode_shift_jis_char):
(Fencode_big5_char):
Docstring arglist/Texinfo fixes.  See man/ChangeLog for details.
Replace 0 with '\0' when working with bytes.
Replace initial "(" with "\(" in docstrings.

(Fmake_coding_system):
When type is ccl and value is vector, register it with a proper
symbol.  And checks whether the given ccl program is valid.
(mule_decode): When calling ccl_driver, if src indicates
NULL pointer, set an empty string instead.
(mule_encode): Likewise.

(detect_eol_type):
(detect_coding_sjis):
(decode_coding_sjis):
(detect_coding_big5):
(decode_coding_big5):
(detect_coding_ucs4):
(decode_coding_ucs4):
(detect_coding_utf8):
(decode_coding_utf8):
(detect_coding_iso2022):
(decode_coding_iso2022):
(decode_coding_no_conversion):
(mule_decode):
Make all detecting and decoding functions take an Extbyte * arg.
(text_encode_generic):
(encode_coding_big5):
(encode_coding_no_conversion):
(mule_encode):
Make all encoding functions take a Bufbyte * arg.
Use size_t instead of unsigned int for memory sizes.
Only cast to unsigned char whenever dereferencing Extbyte *.

(struct lrecord_description fcd_description_1): Use countof.
(complex_vars_of_file_coding):
Use countof instead of sizeof.
Use CHECK_NATNUM instead of CHECK_INT.