The flag diagnostic_context::some_warnings_are_errors controls whether

The flag diagnostic_context::some_warnings_are_errors controls whether
to give the message "all warnings being treated as errors". However, when
warnings are buffered and then discarded, this flag is not reset. It turns
out we do not need this flag at all, since we already count explicitly how
many warnings were converted into errors, and this number is kept up to
date for the buffered diagnostics used by Fortran.

gcc/ChangeLog:

2015-09-14  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR fortran/67460
	* diagnostic.c (diagnostic_initialize): Do not set
	some_warnings_are_errors.
	(diagnostic_finish): Use DK_WERROR count instead.
	(diagnostic_report_diagnostic): Do not set
	some_warnings_are_errors.
	* diagnostic.h (struct diagnostic_context): Remove
	some_warnings_are_errors.

gcc/testsuite/ChangeLog:

2015-09-14  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR fortran/67460
	* gfortran.dg/pr67460.f90: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@227760 138bc75d-0d04-0410-961f-82ee72b054a4