Merge "vkjson: fix VkPhysicalDeviceGroupProperties init"

    VkJsonDeviceGroup device_group;

    std::vector<VkPhysicalDeviceGroupProperties> group_properties;

    group_properties.resize(count);

    for (auto& properties : group_properties) {

      properties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_GROUP_PROPERTIES;

      properties.pNext = nullptr;

    }

    result = (*vkpEnumeratePhysicalDeviceGroups)(vkinstance, &count,

                                                 group_properties.data());

    if (result != VK_SUCCESS) {