Simple patch only add assumed-rank to the list of possible attributes.

Simple patch only add assumed-rank to the list of possible attributes.

gcc/fortran/ChangeLog:

2020-06-03  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

	PR fortran/95214
	PR fortran/66833
	PR fortran/67938
	* trans-expr.c (gfc_maybe_dereference_var): Add assumed-rank to
	character dummy arguments list of possible attributes.

gcc/testsuite/ChangeLog:

2020-06-03  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

	PR fortran/95214
	PR fortran/66833
	PR fortran/67938
	* gfortran.dg/PR95214.f90: New test.