fw4: fix crash in parse_cthelper() if no helpers are present

Properly deal with a possibly uninitialized helper object array.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/root/usr/share/ucode/fw4.uc b/root/usr/share/ucode/fw4.uc
index db1e580ba0e9ee70c1e7bdb00213d819be074203..95e2540a74da869784f562dcada87c811eba51c2 100644 (file)
--- a/root/usr/share/ucode/fw4.uc
+++ b/root/usr/share/ucode/fw4.uc
@@ -1037,7 +1037,7 @@ return {
                if (!rv)
                        return null;
 
-               let helper = filter(this.state.helpers, h => (h.name == rv.val))[0];
+               let helper = filter(this.state.helpers, h => (h.name == rv.val))?.[0];
 
                return helper ? { ...rv, ...helper } : null;
        },