FIX: "undefined" in data field on v6 creation

frontend/src/views/dnsvs/BCDRecords.vue

@@ -667,6 +667,9 @@ export default {
       this.db_editor_function = 'create'
       this.db_editor_old_data = {}
       const recobj = this.record_types_by_name[record_type] || null
+      if (!data) {
+        data = ''
+      }
       this.db_editor_presets = {
         type: record_type,
         data: data,