patch 7.4.2212
Problem: Mark " is not set when closing a window in another tab. (Guraga)
Solution: Check all tabs for the window to be valid. (based on patch by
Hirohito Higashi, closes #974)
diff --git a/src/proto/window.pro b/src/proto/window.pro
index ebd71ed..d82988e 100644
--- a/src/proto/window.pro
+++ b/src/proto/window.pro
@@ -4,6 +4,7 @@
int win_split(int size, int flags);
int win_split_ins(int size, int flags, win_T *new_wp, int dir);
int win_valid(win_T *win);
+int win_valid_any_tab(win_T *win);
int win_count(void);
int make_windows(int count, int vertical);
void win_move_after(win_T *win1, win_T *win2);