Description:
------------
PHP 5.3.3 supposedly brought PDO::inTransaction() with a special implementation 
for PostgreSQL wich uses libpq's PQtransactionStatus instead of internal 
bookkeeping.

According to the test attached with the revision where this was added 
(is_in_transaction.phpt, revision 300351), inTransaction() is supposed to return 
any of the PGSQL_TRANSACTION_* constants.

Unfortunately that's not the case and inTransaction(), even when used in 
conjunction with PostgreSQL only returns boolean and doesn't use the actual 
transaction status of the connection but just returns true or false depending on 
whether PDO::beginTransaction() has been called or not.

PHP's own test runner illustrates the problem, which is why I don't bother 
adding an additional test script - the included is_in_transaction.phpt is 
enough:

http://gcov.php.net/viewer.php?
version=PHP_5_3&func=tests&file=ext%2Fpdo_pgsql%2Ftests%2Fis_in_transaction.phpt

Expected result:
----------------
When running the phpt file, I expect the following output:

Test PDO::PGSQL_TRANSACTION_INTRANS
int(2)
Test PDO::PGSQL_TRANSACTION_IDLE
int(0)
Test PDO::PGSQL_TRANSACTION_INERROR
int(3)
Test PDO::PGSQL_TRANSACTION_IDLE
int(0)


Actual result:
--------------
When running the phpt file, I (and PHP's webbased test runner) is getting


Test PDO::PGSQL_TRANSACTION_INTRANS
int(1)
Test PDO::PGSQL_TRANSACTION_IDLE
int(0)
Test PDO::PGSQL_TRANSACTION_INERROR
int(1)
Test PDO::PGSQL_TRANSACTION_IDLE
int(0)