* charset.c (_cpp_destroy_iconv, emit_numeric_escape)

	(_cpp_convert_input, _cpp_default_encoding): Add comments.
	Some other comments in this file also tweaked.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@87688 138bc75d-0d04-0410-961f-82ee72b054a4