From: Holger Schemel <info@artsoft.org>
Date: Fri, 3 Sep 2021 13:22:48 +0000 (+0200)
Subject: fixed tree node navigation bug (when stepping up empty sub-trees)
X-Git-Tag: 4.3.0.0~84
X-Git-Url: https://git.artsoft.org/?a=commitdiff_plain;h=8d2e9e21529dc319434b41ef95ecc6364c806fb5;p=rocksndiamonds.git

fixed tree node navigation bug (when stepping up empty sub-trees)
---

diff --git a/src/libgame/setup.c b/src/libgame/setup.c
index dfd9ac61..403d0dae 100644
--- a/src/libgame/setup.c
+++ b/src/libgame/setup.c
@@ -1300,10 +1300,11 @@ TreeInfo *getFirstValidTreeInfoEntry(TreeInfo *node)
 
   if (node->parent_link)	// skip first node (back link) of node group
   {
-    if (node->next)		// get next regular node
-      return getFirstValidTreeInfoEntry(node->next);
-    else			// leave empty node group and go on
-      return getFirstValidTreeInfoEntry(node->node_parent->next);
+    // get next regular tree node, or step up until one is found
+    while (node->next == NULL && node->node_parent != NULL)
+      node = node->node_parent;
+
+    return getFirstValidTreeInfoEntry(node->next);
   }
 
   // this is a regular tree node