coreblas: Handle recursive descriptors

runtime/starpu/control/runtime_descriptor.c

@@ -385,8 +385,10 @@ void RUNTIME_data_flush( const RUNTIME_sequence_t *sequence,
     int64_t mm = m + (A->i / A->mb);
     int64_t nn = n + (A->j / A->nb);
     int64_t shift = ((int64_t)A->lmt) * nn + mm;
-    starpu_data_handle_t *handle = A->schedopt + shift;
-    CHAM_tile_t          *tile   = A->tiles    + shift;
+    starpu_data_handle_t *handle = A->schedopt;
+    CHAM_tile_t          *tile   = A->tiles;
+    handle += shift;
+    tile   += shift;
 
     if (*handle == NULL) {
         return;