tests: return-codes script is bash specific

The script fails on systems where sh is not bash.

Signed-off-by: Florian Westphal <fw@strlen.de>

diff --git a/iptables/tests/shell/testcases/iptables/0004-return-codes_0 b/iptables/tests/shell/testcases/iptables/0004-return-codes_0
index 15f3a3e9efb68bc973f42eb85f7fb35ac5cf28ff..ce02e0bcb128ba23a500ecf91b3b1e637305a734 100755 (executable)
--- a/iptables/tests/shell/testcases/iptables/0004-return-codes_0
+++ b/iptables/tests/shell/testcases/iptables/0004-return-codes_0
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # make sure error return codes are as expected useful cases
 # (e.g. commands to check ruleset state)