Add the 'undoreload' option to be able to undo a file reload.
diff --git a/src/proto/buffer.pro b/src/proto/buffer.pro
index a5fe42f..df9c0b4 100644
--- a/src/proto/buffer.pro
+++ b/src/proto/buffer.pro
@@ -1,9 +1,9 @@
/* buffer.c */
-int open_buffer __ARGS((int read_stdin, exarg_T *eap));
+int open_buffer __ARGS((int read_stdin, exarg_T *eap, int flags));
int buf_valid __ARGS((buf_T *buf));
void close_buffer __ARGS((win_T *win, buf_T *buf, int action));
void buf_clear_file __ARGS((buf_T *buf));
-void buf_freeall __ARGS((buf_T *buf, int del_buf, int wipe_buf));
+void buf_freeall __ARGS((buf_T *buf, int flags));
void goto_buffer __ARGS((exarg_T *eap, int start, int dir, int count));
void handle_swap_exists __ARGS((buf_T *old_curbuf));
char_u *do_bufdel __ARGS((int command, char_u *arg, int addr_count, int start_bnr, int end_bnr, int forceit));
diff --git a/src/proto/undo.pro b/src/proto/undo.pro
index a914c49..2cb149f 100644
--- a/src/proto/undo.pro
+++ b/src/proto/undo.pro
@@ -5,6 +5,7 @@
int u_inssub __ARGS((linenr_T lnum));
int u_savedel __ARGS((linenr_T lnum, long nlines));
int undo_allowed __ARGS((void));
+int u_savecommon __ARGS((linenr_T top, linenr_T bot, linenr_T newbot, int reload));
void u_compute_hash __ARGS((char_u *hash));
char_u *u_get_undo_file_name __ARGS((char_u *buf_ffname, int reading));
void u_write_undo __ARGS((char_u *name, int forceit, buf_T *buf, char_u *hash));