check_pgsql: Fixed query perfdata output for empty warn/crit ranges.

Previously, "(null)" was printed (when using GNU's libc). This has been
changed to print the empty string instead.

diff --git a/plugins/check_pgsql.c b/plugins/check_pgsql.c
index fee9585fad81e939c29ea21917b8ef883168dd70..0f6eda479dee2f5c0862f853e0111310f9dc0b47 100644 (file)
--- a/plugins/check_pgsql.c
+++ b/plugins/check_pgsql.c
@@ -578,7 +578,9 @@ do_query (PGconn *conn, char *query)
                                                ? _("CRITICAL")
                                                : _("UNKNOWN"));
        printf (_("'%s' returned %f"), query, value);
-       printf ("|query=%f;%s;%s;0\n", value, query_warning, query_critical);
+       printf ("|query=%f;%s;%s;0\n", value,
+                       query_warning ? query_warning : "",
+                       query_critical ? query_critical : "");
        return my_status;
 }