Seems to break snapper

[ 60s] BtrfsUtils.cc: In function 'void snapper::BtrfsUtils::create_snapshot(int, int, const string&, bool, snapper::BtrfsUtils::qgroup_t)': [ 60s] BtrfsUtils.cc:148:24: error: 'btrfs_qgroup_inherit' was not declared in this scope [ 60s] size_t size = sizeof(btrfs_qgroup_inherit) + sizeof(((btrfs_qgroup_inherit*) 0)->qgroups[0]);

but there was no change to 'btrfs_qgroup_inherit' between 4.19 and 4.20, dunno why it fails