CBORATTR_STRUCT_ARRY and CBORATTR_STRUCT_OBJECT not suitable with CborAttrByteStringType

[Cimex97]

Hello,
I Want to parse a CBOR Payload into an own struct image[].
The CBOR Payload looks like that:

{
    "images": [{
       "slot": 0, 
       "version": "1.6.0",
       "hash": h'C0273A8B3D307B1D5607F52617F3A08B29582AE56D4C1763929A70BEF31685BD', 
       "bootable": true, 
       "pending": false, 
       "confirmed": true, 
       "active": true, 
       "permanent": false
    }], 
    "splitStatus": 0
}

I try to use the macros CBORATTR_STRUCT_ARRAY and CBORATTR_STRUCT_OBJECT
with different object types (This is based on this testcase):

…
    struct image arr_objs[2] = {{0},{0}};

    int array_cnt;
    size_t hash_len= 0;

   struct cbor_attr_t sub_attr[] = {
        [0] = {
            .attribute = "slot",
            .type = CborAttrIntegerType,
            CBORATTR_STRUCT_OBJECT(struct image, slot),
            .nodefault = true,
         },
        [1] = {
            .attribute = "version",
            .type = CborAttrTextStringType,
            .len = sizeof(arr_objs[0].version),
            CBORATTR_STRUCT_OBJECT(struct image, version),
            .nodefault = true,
        },                
        [2] = {
            .attribute = "hash",
            .type = CborAttrByteStringType,
            .len = sizeof(arr_objs[0].hash),
            CBORATTR_STRUCT_OBJECT(struct image, hash),
            .nodefault = true,
        },
    …
    }


    struct cbor_attr_t test_attrs[] = {
        [0] = {
            .attribute = "images",
            .type = CborAttrArrayType,
            CBORATTR_STRUCT_ARRAY(arr_objs, sub_attr, &array_cnt),
            .nodefault = true
        },
        [1] = {
            .attribute = NULL
        }
    };
    int rc = cbor_read_object(&it, test_attrs);
…

The struct image:

struct image {
    int slot;
    char version[32];
    uint8_t hash[32];
    bool bootable;
    bool pending;
    bool confirmed;
    bool active;
    bool permanent;
};

The function: cbor_read_object calls always *cursor->addr.bytestring.len = len; so that I get a nullptr exception. If I understand that correctly, the function can not use .addr.bytestring.* if a parent is present with a type of CborAttrStructObjectType.

To solve this problem I added a if statement:

if (parent == NULL || parent->element_type != CborAttrStructObjectType) {
    *cursor->addr.bytestring.len = len;
}