main: exit with error on failure to init arena

This handler got broken when exit_nicely stopped actually triggering
an exit from the entire process and started just exiting the guile thread.

And, actually, it never exited with an error-status before--
which it does now.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index 9867bcb..df81cd7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -305,6 +305,7 @@ void main_prog(void *closure, gint argc, gchar *argv[])
 	if (map == NULL)
 	{
 		exit_nicely();
+		exit (1);
 	}
 
 	/* ensure the robot is placed properly */