--- a/src/xs_length.c	Tue Nov 06 13:31:36 2012 +0200
+++ b/src/xs_length.c	Tue Nov 06 13:34:25 2012 +0200
@@ -43,17 +43,17 @@
  */
 static void xs_sldb_node_insert(XSSLDB *db, XSSLDBNode *node)
 {
-    assert(db);
+    assert(db != NULL);
 
     if (db->nodes) {
-        LPREV = db->nodes->prev;
+        node->prev = db->nodes->prev;
         db->nodes->prev->next = node;
         db->nodes->prev = node;
     } else {
         db->nodes = node;
-        LPREV = node;
+        node->prev = node;
     }
-    LNEXT = NULL;
+    node->next = NULL;
 }