hush: fix the comment

diff --git a/shell/hush.c b/shell/hush.c
index e9d0355..02ec0ea 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -3882,7 +3882,7 @@
 	if (interactive_fd) {
 		/* Looks like they want an interactive shell */
 		setup_job_control();
-		/* -1 is special - makes xfuncs longjmp on exit
+		/* -1 is special - makes xfuncs longjmp, not exit
 		 * (we reset die_sleep = 0 whereever we [v]fork) */
 		die_sleep = -1;
 		if (setjmp(die_jmp)) {