* cgen-asm.in (parse_insn_normal): Changed syn to be
CGEN_SYNTAX_CHAR_TYPE. Changed all references to *syn
as character to use CGEN_SYNTAX_CHAR macro and all comparisons
to '\0' to use 0 instead.
* cgen-dis.in (print_insn_normal): Ditto.
* cgen-ibld.in (insert_insn_normal, extract_insn_normal): Ditto.