[patch, fortran, committed] Fix PR 78221

[Thomas Koenig]

Hello world,

I have committed the attached patch to the regression as obvious and
simple after regression-testing.  Will commit to gcc 6 in a
few days.

Regards

	Thomas

2016-11-06  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/78221
	* arith.c (gfc_complex2real):  Change gfc_warning_now to
	gfc_warning.

2016-11-06  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/78221
	* gfortran.dg/warn_conversion_9.f90:  New test.
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