Fix listing buckets and also figure out how to do so

minio.go

@@ -30,6 +30,9 @@ func (m *Minio) List(ns []string, limits ...string) ([]string, error) {
 	defer close(done)
 	keys := []string{}
 	for resp := range m.db.ListObjects(namespace, "", true, done) {
+		if resp.Err != nil {
+			return keys, resp.Err
+		}
 		if resp.Key < limits[0] {
 			continue
 		} else if resp.Key > limits[1] {