all: fix issues reported by honnef.co/go/simple/cmd/gosimple

swarm/storage/dbstore.go

@@ -354,7 +354,7 @@ func (s *DbStore) Get(key Key) (chunk *Chunk, err error) {
 		hasher := s.hashfunc()
 		hasher.Write(data)
 		hash := hasher.Sum(nil)
-		if bytes.Compare(hash, key) != 0 {
+		if !bytes.Equal(hash, key) {
 			s.db.Delete(getDataKey(index.Idx))
 			err = fmt.Errorf("invalid chunk. hash=%x, key=%v", hash, key[:])
 			return

swarm/storage/types.go

@@ -41,7 +41,7 @@ func (x Key) Size() uint {
 }
 
 func (x Key) isEqual(y Key) bool {
-	return bytes.Compare(x, y) == 0
+	return bytes.Equal(x, y)
 }
 
 func (h Key) bits(i, j uint) uint {