Cleanups

src/base_core.h

@@ -473,6 +473,7 @@ do {                                     \
 } while (0)
 
 #define SListIsEmpty(list)    ((list)->first == NULL)
+#define SListResetNode(node)  ((node)->next = NULL)
 
 /*
   DList - doubly linked lists
@@ -573,8 +574,7 @@ do {                                            \
     } else {                                    \
       (list)->first = (entry)->next;            \
     }                                           \
-  (entry)->next = NULL;                         \
-  (entry)->prev = NULL;                         \
 } while (0)
 
 #define DListIsEmpty(list)    ((list)->first == NULL)
+#define DListResetNode(node) ((node)->next = (node)->prev = NULL)