scene_obj_find can return NULL but this is not checked for before
the return is dereferenced. Add a NULL check.

This issue was found by Smatch.

Also add a NULL check for str.

Signed-off-by: Andrew Goodbody <andrew.goodb...@linaro.org>
---
Changes in v2:
- rebase to -next
- Add a NULL check for str
- Link to v1: 
https://lore.kernel.org/r/20250630-scene_menu_fix-v1-1-9ccb9a49c...@linaro.org
---
 boot/scene_menu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/boot/scene_menu.c b/boot/scene_menu.c
index 8db6a2b2f4d..23404172093 100644
--- a/boot/scene_menu.c
+++ b/boot/scene_menu.c
@@ -571,14 +571,15 @@ int scene_menu_display(struct scene_obj_menu *menu)
                        return log_msg_ret("txt", -EINVAL);
 
                str = expo_get_str(exp, txt->gen.str_id);
-               printf("%s\n\n", str);
+               printf("%s\n\n", str ? str : "");
        }
 
        if (list_empty(&menu->item_head))
                return 0;
 
        pointer = scene_obj_find(scn, menu->pointer_id, SCENEOBJT_TEXT);
-       pstr = expo_get_str(scn->expo, pointer->gen.str_id);
+       if (pointer)
+               pstr = expo_get_str(scn->expo, pointer->gen.str_id);
 
        list_for_each_entry(item, &menu->item_head, sibling) {
                struct scene_obj_txt *key = NULL, *label = NULL;

---
base-commit: 5ab660663ded12cd6e063933016d27c9eafda2f3
change-id: 20250630-scene_menu_fix-60640ea67c20

Best regards,
-- 
Andrew Goodbody <andrew.goodb...@linaro.org>

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