ash,hush: comment and debug tweaks, no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush.c b/shell/hush.c
index 517b8c1..42f95ef 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -9948,7 +9948,7 @@
 		c = '?';
 	}
 
-	/* Set OPTIND */
+	/* Set VAR and OPTIND */
 	cbuf[0] = c;
 	set_local_var_from_halves(var, cbuf);
 	set_local_var_from_halves("OPTIND", utoa(optind));