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

diff --git a/src/libgame/setup.c b/src/libgame/setup.c
index dfd9ac612eb4127d6a0c4496bc1f9ee552f5c42e..403d0dae558baa641d5ebf618fb45a8e514fe9c3 100644 (file)
--- 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