Fortran : False positive for optional arguments PR95446

Fortran  : False positive for optional arguments PR95446

Check that there is non-optional argument of the same rank in the
list of actual arguments.  If there is the warning is not required.

2020-07-01  Steven G. Kargl  <kargl@gcc.gnu.org>

gcc/fortran/

	PR fortran/95446
	* resolve.c (resolve_elemental_actual): Add code to check for
	non-optional argument of the same rank.  Revise warning message
	to refer to the Fortran 2018 standard.

2020-07-01  Mark Eggleston  <markeggleston@gcc.gnu.org>

gcc/testsuite/

	PR fortran/95446
	* gfortran.dg/elemental_optional_args_6.f90: Remove check
	for warnings that were erroneously output.
	* gfortran.dg/pr95446.f90: New test.