patch 7.4.2204
Problem:    It is not easy to get information about buffers, windows and
            tabpages.
Solution:   Add getbufinfo(), getwininfo() and gettabinfo(). (Yegappan
            Lakshmanan)
diff --git a/src/proto/window.pro b/src/proto/window.pro
index e091e34..ebd71ed 100644
--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -86,6 +86,7 @@
 int win_getid(typval_T *argvars);
 int win_gotoid(typval_T *argvars);
 void win_id2tabwin(typval_T *argvars, list_T *list);
+win_T *win_id2wp(typval_T *argvars);
 int win_id2win(typval_T *argvars);
 void win_findbuf(typval_T *argvars, list_T *list);
 /* vim: set ft=c : */