[patch, libfortran] Fix amount of memory allocation for matrix - vector calculation

[Thomas Koenig]

Hello world,

the memory allocation for the buffer in the library matmul
routines still has one problem: The value of 0xdeadbeef meant
as poison could end up in the calculation of the size of the
buffer for the blocked matmul.

The attached patch fixes that. Verified with regression-test,
also by running a few select test cases under valgrind.

No test case because nothing appeared to fail.

OK for trunk?

Regards

	Thomas

2017-05-10  Thomas Koenig  <tkoenig@gcc.gnu.org>

         * m4/matmul_internal.m4:  Set bystride to correct
	value for later calculation of buffer size.
         * generated/matmul_c10.c: Regenerated.
         * generated/matmul_c16.c: Regenerated.
         * generated/matmul_c4.c: Regenerated.
         * generated/matmul_c8.c: Regenerated.
         * generated/matmul_i1.c: Regenerated.
         * generated/matmul_i16.c: Regenerated.
         * generated/matmul_i2.c: Regenerated.
         * generated/matmul_i4.c: Regenerated.
         * generated/matmul_i8.c: Regenerated.
         * generated/matmul_r10.c: Regenerated.
         * generated/matmul_r16.c: Regenerated.
         * generated/matmul_r4.c: Regenerated.
         * generated/matmul_r8.c: Regenerated.