multimedia/ffmpeg: unbreak with clang 15 on i386 after 685e477b

./libavutil/vulkan.c:1173:70: error: incompatible integer to pointer conversion assigning to 'void *' from 'VkDescriptorSetLayout' (aka 'unsigned long long') [-Wint-conversion]
            pl->desc_staging[spawn_pipeline_layout.setLayoutCount++] = pl->desc_layout[i];
                                                                     ^ ~~~~~~~~~~~~~~~~~~
./libavutil/vulkan.c:1272:29: error: incompatible integer to pointer conversion assigning to 'void *' from 'VkDescriptorSet' (aka 'unsigned long long') [-Wint-conversion]
        pl->desc_staging[i] = pl->desc_set[i*pl->qf->nb_queues + pl->qf->cur_queue];
                            ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

PR:		261302
Reported by:	antoine