ompi/oshmem: fix bug in shmem_alltoall in mca/scoll/basic.

cherry picked from af32c30

Signed-off-by: Xin Zhao <[email protected]>

Author: xinzhao3

oshmem/mca/scoll/basic/scoll_basic_alltoall.c

@@ -99,7 +99,7 @@ static int _algorithm_simple(struct oshmem_group_t *group,
         rc = MCA_SPML_CALL(put(
                 (void *)((char *)target + j * tst * nelems * element_size),
                 nelems * element_size,
-                (void *)((char *)source + i * sst * nelems * element_size),
+                (void *)((char *)source + k * sst * nelems * element_size),
                 pe_cur));
         if (OSHMEM_SUCCESS != rc) {
             break;