template pxarexclude - verify if vars are defined before looping

templates/pxarexclude.j2

@@ -1,7 +1,11 @@
 /*
+{% if backup_path_exclude is defined %}
 {% for item in backup_path_exclude %}
 {{ item.value }}
 {% endfor %}
+{% endif %}
+{% if backup_path_include is defined %}
 {% for item in backup_path_include %}
 !{{ item.path }}
 {% endfor %}
+{% endif %}