patch 8.1.1218: cannot set a directory for a tab page
Problem: Cannot set a directory for a tab page.
Solution: Add the tab-local directory. (Yegappan Lakshmanan, closes #4212)
diff --git a/src/proto/eval.pro b/src/proto/eval.pro
index 0e6182f..f501300 100644
--- a/src/proto/eval.pro
+++ b/src/proto/eval.pro
@@ -116,7 +116,7 @@
void ex_execute(exarg_T *eap);
win_T *find_win_by_nr(typval_T *vp, tabpage_T *tp);
win_T *find_win_by_nr_or_id(typval_T *vp);
-win_T *find_tabwin(typval_T *wvp, typval_T *tvp);
+win_T *find_tabwin(typval_T *wvp, typval_T *tvp, tabpage_T **ptp);
void getwinvar(typval_T *argvars, typval_T *rettv, int off);
void setwinvar(typval_T *argvars, typval_T *rettv, int off);
char_u *autoload_name(char_u *name);