re PR fortran/32131 (knowing that stride==1 when using allocated arrays and escaping allocatable arrays)

fortran/
        PR fortran/32131
        * trans-array.c (gfc_conv_descriptor_stride_get): Return
        constant one for strides in the first dimension of ALLOCATABLE
        arrays.

testsuite/
        PR fortran/32131
        * gfortran.dg/pr32921.f: Adjust.

From-SVN: r149178