fix unrestricted quota

changelog/unreleased/fix-unrestricted-quota.md

@@ -0,0 +1,5 @@
+Bugfix: Fix unrestricted quota on the graphAPI
+
+Unrestricted quota needs to show 0 on the API. It is not good for clients when the property is missing.
+
+https://github.com/owncloud/ocis/pull/4363

services/graph/pkg/service/v0/drives.go

@@ -640,16 +640,15 @@ func (g Graph) getDriveQuota(ctx context.Context, space *storageprovider.Storage
 	}
 
 	used := int64(res.UsedBytes)
+	total := int64(res.TotalBytes)
 	qta := libregraph.Quota{
 		Remaining: &remaining,
 		Used:      &used,
+		Total:     &total,
 	}
 
 	var t int64
-	if total := int64(res.TotalBytes); total != 0 {
-
-		// A quota was set
-		qta.Total = &total
+	if total != 0 {
 		t = total
 	} else {
 		// Quota was not set