hush: fix a corner case of empty "do \n done" structure

The structure is:

    while cmd; do
    done

bash doesn't accept it at all. We were accepting it but execution
was buggy.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/shell/hush_test/hush-misc/while3.right b/shell/hush_test/hush-misc/while3.right
new file mode 100644
index 000000000..7c4d7beb0
--- /dev/null
+++ b/shell/hush_test/hush-misc/while3.right
@@ -0,0 +1 @@
+OK:0