[patch, fortran, committed] Fix PR 57792

[Thomas Koenig]

Hell world,

as part of the contiguous improvement process in gfortran, I have
committed the patch below as obvious.  gfortran now does not pack/unpack
if a function result is contiguous.

Regards

	Thomas


2019-01-13  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/57992
	* trans-array.c (gfc_conv_array_parameter):  Do not pack/unpack
	functions with contiguous results.

2019-01-13  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/57792
	* gfortran.dg/internal_pack_18.f90: New test.
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