re PR fortran/79886 (ICE in pp_format, at pretty-print.c:681)

re PR fortran/79886 (ICE in pp_format, at pretty-print.c:681)

	PR fortran/79886
	* tree-diagnostic.c (default_tree_printer): No longer static.
	* tree-diagnostic.h (default_tree_printer): New prototype.
fortran/
	* error.c (gfc_format_decoder): Rename plus argument to set_locus,
	remove ATTRIBUTE_UNUSED from all arguments, call default_tree_printer
	if not a Fortran specific spec.
	* trans-io.c: Include options.h.
	(gfc_build_st_parameter): Temporarily disable -Wpadded around layout
	of artificial IO data structures.
testsuite/
	* gfortran.dg/pr79886.f90: New test.

From-SVN: r246203