* cppinit.c (cpp_post_options): If preprocessed, turn off
	traditional.  If traditional, turn off column numbers.
	* cpplib.c (cpp_push_buffer): Lex from stage 3 if traditional.
	* cpptrad.c (handle_newline): Update line_base.
	(skip_comment): Handle -Wcomment.

From-SVN: r53582