extract default data param

Author: adguernier

packages/ra-ui-materialui/src/list/datagrid/DatagridBody.tsx

@@ -13,7 +13,7 @@ const DatagridBody: FC<DatagridBodyProps> = React.forwardRef(
         {
             children,
             className,
-            data = [],
+            data = defaultData,
             expand,
             hasBulkActions = false,
             hover,
@@ -112,6 +112,8 @@ export interface DatagridBodyProps extends Omit<TableBodyProps, 'classes'> {
     isRowSelectable?: (record: RaRecord) => boolean;
 }
 
+const defaultData = [];
+
 // trick Material UI Table into thinking this is one of the child type it supports
 // @ts-ignore
 DatagridBody.muiName = 'TableBody';