[Coverity 1666198] Explicit null dereferenced in DecoderPlayCcLocked()

A null pointer dereference will occur.

In DecoderPlayCcLocked: Dereference of an explicit null value (CWE-476)

1247    vlc_list_foreach(it, &p_owner->subdecs.list, node)
1248    {
       9. Condition !SubDecoderIsCc(it), taking true branch.
       13. Condition !SubDecoderIsCc(it), taking false branch.
       20. Condition !SubDecoderIsCc(it), taking false branch.
1249        if (!SubDecoderIsCc(it))
       10. Continuing loop.
1250            continue;
1251
       14. Condition ++cc_idx == p_owner->cc.count, taking true branch.
       21. Condition ++cc_idx == p_owner->cc.count, taking false branch.
1252        if (++cc_idx == p_owner->cc.count)
1253        {
1254            block_FifoPut(it->p_fifo, p_cc);
       15. assign_zero: Assigning: p_cc = NULL.
1255            p_cc = NULL;
       16. Falling through to end of if statement.
1256        }
1257        else
1258        {
      
CID 1666198: (#1 of 1): Explicit null dereferenced (FORWARD_NULL)
22. var_deref_model: Passing null pointer p_cc to vlc_frame_Duplicate, which dereferences it.[show details]
1259            block_t *dup = block_Duplicate(p_cc);
1260            if (dup == NULL)
1261                break;
1262            block_FifoPut(it->p_fifo, dup);
1263        }
       17. Jumping back to the beginning of the loop.
1264    }