Check if the index is in use and fail before creating the child process,

rather than leaving a stray child on failure.

1 files changed, 2 insertions, 1 deletions

diff --git a/tmux.h b/tmux.h
index f6a45d33..a1e31e32 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1828,7 +1828,8 @@ struct winlink	*winlink_find_by_index(struct winlinks *, int);
 struct winlink	*winlink_find_by_window(struct winlinks *, struct window *);
 int		 winlink_next_index(struct winlinks *, int);
 u_int		 winlink_count(struct winlinks *);
-struct winlink	*winlink_add(struct winlinks *, struct window *, int);
+struct winlink	*winlink_add(struct winlinks *, int);
+void		 winlink_set_window(struct winlink *, struct window *);
 void		 winlink_remove(struct winlinks *, struct winlink *);
 struct winlink	*winlink_next(struct winlink *);
 struct winlink	*winlink_previous(struct winlink *);