ECPG ignores SAVEPOINT if first statement of a transaction

ECPG ignores SAVEPOINT if it's the first statement of a transaction:

% cat foo.pgc
int
main(void)
{
EXEC SQL WHENEVER SQLERROR SQLPRINT;
EXEC SQL WHENEVER SQLWARNING SQLPRINT;

EXEC SQL CONNECT TO test;

EXEC SQL SAVEPOINT foo;
EXEC SQL DROP TABLE nosuch_1;
EXEC SQL ROLLBACK TO foo;
EXEC SQL DROP TABLE nosuch_2;

EXEC SQL COMMIT;
EXEC SQL DISCONNECT;

return 0;
}

% ./foo
sql error 'table "nosuch_1" does not exist' in line 10.
sql error 'current transaction is aborted, commands ignored until end of transa

The SAVEPOINT code is generated but apparently ECPGtrans() doesn't
execute it. A sniff of the connection doesn't show it, and the
sniff shows the ROLLBACK TO failing with "no such savepoint."

If I execute a command before the SAVEPOINT then I get the following,
which is what I was expecting:

% ./foo
sql error 'table "nosuch_1" does not exist' in line 11.
sql error 'table "nosuch_2" does not exist' in line 13.

A sniff of this connection shows both the SAVEPOINT and ROLLBACK TO
being executed and succeeding.

--
Michael Fuhr
http://www.fuhr.org/~mfuhr/