test_librt: Fix shmtest.c test case

Fix wrong use of sizeof (array) to retrieve the number
of elements; it was causing accessing beyond the array's boundaries.

Below the output of the testcase showing an attempt to read beyond
the array (actually 11 elements in size).

root@amorosoc:/home/carmelo# ./shmtest
Compare memory error                    : Offset 11, local 4262624, shm 224
Compare memory error                    : Offset 12, local 693493828, shm 68
Compare memory error                    : Offset 13, local 693489168, shm 16
Compare memory error                    : Offset 14, local 693826444, shm 20
.....

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

0 files changed, 0 insertions, 0 deletions