minor fixes in auto email report

frappe/email/doctype/auto_email_report/auto_email_report.js

@@ -66,7 +66,7 @@ frappe.ui.form.on('Auto Email Report', {
 
 			var filters = JSON.parse(frm.doc.filters || '{}');
 			var report_filters = frappe.query_reports[frm.doc.report].filters;
-			if(report_filters.length > 0) {
+			if(report_filters && report_filters.length > 0) {
 				frm.set_value('filter_meta', JSON.stringify(report_filters));
 			}