added step-based engine snapshots to undo/redo game steps

[rocksndiamonds.git] / src / libgame / misc.c

diff --git a/src/libgame/misc.c b/src/libgame/misc.c
index c02d392067f81401ad910a666f72da1eb9e196f8..052509f6f914e8afd9f25985d05f62ef70349a13 100644 (file)
--- a/src/libgame/misc.c
+++ b/src/libgame/misc.c
@@ -1965,6 +1965,10 @@ void addNodeToList(ListNode **node_first, char *key, void *content)
   node_new->key = getStringCopy(key);
   node_new->content = content;
   node_new->next = *node_first;
+
+  if (*node_first)
+    (*node_first)->prev = node_new;
+
   *node_first = node_new;
 }
 
@@ -1977,8 +1981,15 @@ void deleteNodeFromList(ListNode **node_first, char *key,
   if (strEqual((*node_first)->key, key))
   {
     checked_free((*node_first)->key);
+
     if (destructor_function)
       destructor_function((*node_first)->content);
+
+    if ((*node_first)->next)
+      (*node_first)->next->prev = (*node_first)->prev;
+
+    checked_free(*node_first);
+
     *node_first = (*node_first)->next;
   }
   else