re PR fortran/77420 (gfortran and equivalence produces internal compiler error)

2016-09-26  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/77420
	* trans-common.c:  Handle array elements in equivalence when
	the lower and upper bounds of array spec are NULL.
 
2016-09-26  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/77420
	* gfortran.dg/pr77420_1.f90: New test.
	* gfortran.dg/pr77420_2.f90: Ditto.
	* gfortran.dg/pr77420_3.f90: New test. Requires ...
	* gfortran.dg/pr77420_4.f90: this file.

From-SVN: r240506