Ignore default-shell (and use /bin/sh) if it invalid not just if it is

tmux itself, also refuse to set the option to something invalid in the
first place. GitHub issue 2120.

1 files changed, 1 insertions, 1 deletions

diff --git a/tmux.h b/tmux.h
index 786cb0dd..72e0e9b9 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1771,7 +1771,7 @@ extern const char	*socket_path;
 extern const char	*shell_command;
 extern int		 ptm_fd;
 extern const char	*shell_command;
-int		 areshell(const char *);
+int		 checkshell(const char *);
 void		 setblocking(int, int);
 const char	*find_cwd(void);
 const char	*find_home(void);