backport: re PR preprocessor/57580 (Repeated _Pragma message directives in macro...

backport: re PR preprocessor/57580 (Repeated _Pragma message directives in macro causes problems)

	Backported from mainline
	2015-12-03  Jakub Jelinek  <jakub@redhat.com>

	PR preprocessor/57580
	* c-ppoutput.c (print): Change printed field to bool.
	(init_pp_output): Set print.printed to false instead of 0.
	(scan_translation_unit): Fix up formatting.  Set print.printed
	to true after printing something other than newline.
	(scan_translation_unit_trad): Set print.printed to true instead of 1.
	(maybe_print_line_1): Set print.printed to false instead of 0.
	(print_line_1): Likewise.
	(do_line_change): Set print.printed to true instead of 1.
	(cb_define, dump_queued_macros, cb_include, cb_def_pragma,
	dump_macro): Set print.printed to false after printing newline.

	* c-c++-common/cpp/pr57580.c: New test.
	* c-c++-common/gomp/pr57580.c: New test.

From-SVN: r233321