fix go vet

Author: marten-seemann

data/builder/builder.go

@@ -49,7 +49,7 @@ type Builder struct {
 func DataType(b *Builder, dataType int64) {
 	_, ok := data.DataTypeNames[dataType]
 	if !ok {
-		panic(data.ErrInvalidDataType{dataType})
+		panic(data.ErrInvalidDataType{DataType: dataType})
 	}
 	qp.MapEntry(b.MapAssembler, data.Field__DataType, qp.Int(dataType))
 	b.hasDataType = true

directory/basicdir.go

@@ -22,7 +22,7 @@ type _UnixFSBasicDir struct {
 
 func NewUnixFSBasicDir(ctx context.Context, substrate dagpb.PBNode, nddata data.UnixFSData, _ *ipld.LinkSystem) (ipld.Node, error) {
 	if nddata.FieldDataType().Int() != data.Data_Directory {
-		return nil, data.ErrWrongNodeType{data.Data_Directory, nddata.FieldDataType().Int()}
+		return nil, data.ErrWrongNodeType{Expected: data.Data_Directory, Actual: nddata.FieldDataType().Int()}
 	}
 	return &_UnixFSBasicDir{_substrate: substrate}, nil
 }

hamt/util.go

@@ -59,7 +59,7 @@ func (hb *hashBits) next(i int) int {
 
 func validateHAMTData(nd data.UnixFSData) error {
 	if nd.FieldDataType().Int() != data.Data_HAMTShard {
-		return data.ErrWrongNodeType{data.Data_HAMTShard, nd.FieldDataType().Int()}
+		return data.ErrWrongNodeType{Expected: data.Data_HAMTShard, Actual: nd.FieldDataType().Int()}
 	}
 
 	if !nd.FieldHashType().Exists() || uint64(nd.FieldHashType().Must().Int()) != HashMurmur3 {