casting value to string prevents jninja error

roles/icingaweb2/templates/ini_template.j2

@@ -4,7 +4,7 @@
 [{{ section }}]
 {% for option, value in options.items() %}
 {% if value is number %}
-{{ option }} = "{{ value }}"
+{{ option }} = "{{ value | string }}"
 {% elif value is iterable and (value is not string and value is not mapping) %}
 {{ option }} = "{{ value | join(', ') }}"
 {% elif ( value is string and ( "=" in value or "!" in value ) )%}