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/structs.h b/src/structs.h
index 89749e5..40e87d5 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -2574,6 +2574,9 @@
int tp_prev_which_scrollbars[3];
/* previous value of which_scrollbars */
#endif
+
+ char_u *tp_localdir; // absolute path of local directory or
+ // NULL
#ifdef FEAT_DIFF
diff_T *tp_first_diff;
buf_T *(tp_diffbuf[DB_COUNT]);