* cpplib.c (line_for_error):  Make it work; add extra parameter.
(skip_quoted_string, cpp_get_token):  Update calls to line_for_error.
(macroexpand):  Remember initial line so we can report it if the
call is unterminated.  Also, simplify error logic slightly.
(do_include):  Cast alloca return value, to avoid pcc warning.

From-SVN: r9635