template brain_backup - handle var condition correctly

templates/brain_backup.j2

@@ -60,7 +60,6 @@ mkdir -p $backup_dir/$today/mysql
 for db in $mysql_databases;
     do mysqldump -e -q -Q --lock-tables $db | gzip -c > $backup_dir/$today/mysql/dump_$db.sql.gz;
 done
-
 ## end of mysql ##
 {% endif %}
 
@@ -85,15 +84,15 @@ find $backup_dir -type d -ctime +$backup_local_retention -exec rm -rf {} \;
 
 ## send to PBS ##
 /usr/bin/proxmox-backup-client backup slash.pxar:/ \
-{% if backup_path_include %}
+{% if backup_path_include is defined %}
 {% for item in backup_path_include %}
 {% if item.fs_mount %}--include-dev {{ item.path }} \{% endif %}
 {% endfor %}
 {% endif %}
-{% if backup_pgsql_enabled %}
+{% if backup_pgsql_enabled is sameas true %}
 postgresql.pxar:$backup_dir/$today/postgresql \
 {% endif %}
-{% if backup_mysql_enabled %}
+{% if backup_mysql_enabled is sameas true %}
 mysql.pxar:$backup_dir/$today/mysql \
 {% endif %}
 --rate ${PBS_RATE}