re PR fortran/78661 ([OOP] Namelist output missing object designator under DTIO)

re PR fortran/78661 ([OOP] Namelist output missing object designator under DTIO)

2017-03-28  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/78661
	* trans-io.c (transfer_namelist_element): Perform a polymorphic call
	to a DTIO procedure if necessary.

2017-03-28  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/78661
	* gfortran.dg/dtio_25.f90: Modified test case.
	* gfortran.dg/dtio_27.f90: New test case.

2017-03-28  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/78661
	* io/write.c (nml_write_obj): Build a class container only if necessary.

From-SVN: r246546