fix var check in notify_text_internal

diff --git a/script/notify.yaml b/script/notify.yaml
index 4d0a932f9857e3bfa1aa949f1bc2fb5422379b7c..db996bfd354adad7d69daa52129bf3e53e18afd1 100644 (file)
--- a/script/notify.yaml
+++ b/script/notify.yaml
@@ -26,7 +26,7 @@ notify_text_internal:
 \r
     - condition: template\r
       value_template: >\r
-        {% if enable_persistent | length != 0 %}\r
+        {% if enable_persistent is defined %}\r
           {% if enable_persistent | int == 1 %}\r
             true\r
           {% else %}\r