postgresql: add sanity checking

Clean postgresql handler at deinit.

diff --git a/output/pgsql/ulogd_output_PGSQL.c b/output/pgsql/ulogd_output_PGSQL.c
index f246153d5c6c17385e6ceaa8e6912f92685ab17d..88fb7654659393664a027e34c095238e3887f160 100644 (file)
--- a/output/pgsql/ulogd_output_PGSQL.c
+++ b/output/pgsql/ulogd_output_PGSQL.c
@@ -214,7 +214,9 @@ static int close_db_pgsql(struct ulogd_pluginstance *upi)
 {
        struct pgsql_instance *pi = (struct pgsql_instance *) upi->private;
 
-       PQfinish(pi->dbh);
+       if (pi->dbh)
+               PQfinish(pi->dbh);
+       pi->dbh = NULL;
 
        return 0;
 }