Add file save counter to undo information. Add undotree() function.
diff --git a/src/proto/eval.pro b/src/proto/eval.pro
index 6d11d97..5a85e46 100644
--- a/src/proto/eval.pro
+++ b/src/proto/eval.pro
@@ -56,6 +56,7 @@
void dictitem_free __ARGS((dictitem_T *item));
int dict_add __ARGS((dict_T *d, dictitem_T *item));
int dict_add_nr_str __ARGS((dict_T *d, char *key, long nr, char_u *str));
+int dict_add_list __ARGS((dict_T *d, char *key, list_T *list));
dictitem_T *dict_find __ARGS((dict_T *d, char_u *key, int len));
char_u *get_dict_string __ARGS((dict_T *d, char_u *key, int save));
long get_dict_number __ARGS((dict_T *d, char_u *key));