BLI_bvhtree_overlap: Fix wrong count of child nodes

As you can see, here is testing the "children" of `node1`.
So bvhtree is `tree1`.

This problem has never been observed because usually `tree_type`
of `tree1` equals `tree_type` of `tree2`.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenlib/intern/BLI_kdopbvh.c b/source/blender/blenlib/intern/BLI_kdopbvh.c
index 2674e6c61dc..7ac4a362cf4 100644
--- a/source/blender/blenlib/intern/BLI_kdopbvh.c
+++ b/source/blender/blenlib/intern/BLI_kdopbvh.c
@@ -1129,7 +1129,7 @@ static void tree_overlap_traverse(BVHOverlapData_Thread *data_thread,
       }
     }
     else {
-      for (j = 0; j < data->tree2->tree_type; j++) {
+      for (j = 0; j < data->tree1->tree_type; j++) {
         if (node1->children[j]) {
           tree_overlap_traverse(data_thread, node1->children[j], node2);
         }
@@ -1176,7 +1176,7 @@ static void tree_overlap_traverse_cb(BVHOverlapData_Thread *data_thread,
       }
     }
     else {
-      for (j = 0; j < data->tree2->tree_type; j++) {
+      for (j = 0; j < data->tree1->tree_type; j++) {
         if (node1->children[j]) {
           tree_overlap_traverse_cb(data_thread, node1->children[j], node2);
         }