[PATCH] PR fortran/78278 -- Issue error message for double initialization

[Steve Kargl]

The attach patch re-arranges code to permit gfortran to issue
an error message under non-gnu -std=* options when an entity
appears in a double initialization.  Prior to this patch,
the new testcase pr78278.f90 would compile without error.
Regression tested on x86_64-*-freebsd.  OK to commit?

2018-06-08  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/78278
	* data.c (gfc_assign_data_value): Re-arrange code to allow for
	an error for double initialization of CHARACTER entities.

2018-06-08  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/78278
	* gfortran.dg/data_bounds_1.f90: Add -std=gnu option.
	* gfortran.dg/data_char_1.f90: Ditto.
	* gfortran.dg/pr78571.f90: Ditto.
	* gfortran.dg/pr78278.f90: New test.

-- 
Steve
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