From 6b9c6085ffd8455f6a75f5a5aaf1dcbda040a662 Mon Sep 17 00:00:00 2001
From: David Knapp <david.knapp@dlr.de>
Date: Mon, 26 Jun 2023 13:16:10 +0200
Subject: [PATCH] Set child_id to 0 for the root-element

---
 src/t8_schemes/t8_default/t8_default_pyramid/t8_dpyramid_bits.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/t8_schemes/t8_default/t8_default_pyramid/t8_dpyramid_bits.c b/src/t8_schemes/t8_default/t8_default_pyramid/t8_dpyramid_bits.c
index 26af2c8ef3..f910a85640 100644
--- a/src/t8_schemes/t8_default/t8_default_pyramid/t8_dpyramid_bits.c
+++ b/src/t8_schemes/t8_default/t8_default_pyramid/t8_dpyramid_bits.c
@@ -1425,7 +1425,7 @@ t8_dpyramid_child_id (const t8_dpyramid_t *p)
   if (t8_dpyramid_shape (p) == T8_ECLASS_PYRAMID ||
       p->switch_shape_at_level == p->pyramid.level) {
     if (p->pyramid.level == 0) {
-      return -1;
+      return 0;
     }
     const t8_dpyramid_cube_id_t cube_id =
       compute_cubeid (p, p->pyramid.level);