rem: if (!parameters)
add: if (!_parameters)
context: _kern_set_partition_parameters(partition_id partitionID, int32 changeCounter,							   const char *parameters){	if (!parameters)		return B_BAD_VALUE;	KDiskDeviceManager *manager = KDiskDeviceManager::Default();	// get the partition	KPartition *partition = manager->WriteLockPartition(partitionID);	if (!partition)		return B_ENTRY_NOT_FOUND;	PartitionRegistrar registrar1(partition, true);	PartitionRegistrar registrar2(partition->Device(), true);	DeviceWriteLocker locker(partition->Device(), true);	// check parameters	status_t error = validate_set_partition_parameters(partition,		changeCounter, parameters);	if (error != B_OK)		return error;	// set type	error = partition->SetParameters(parameters);	if (error != B_OK)		return error;	partition->Changed(B_PARTITION_CHANGED_PARAMETERS);	// implicit partitioning system changes	return partition->Parent()->DiskSystem()->ShadowPartitionChanged(		partition, B_PARTITION_SET_PARAMETERS);}