Description:
------------
When issuing an invalid DDL statement, e.g. "DELETE FROM 
nosuchtable" the driver does not detect an error.

Reproduce code:
---------------
<?php

echo "Connecting...";
$conn = ingres_connect("demodb");
echo "done\n";

echo "Sending query...";
$nosuchtable = ingres_query($conn, "delete from aunt_betty");
echo "done\n";

echo "testing for error\n";
if (ingres_errno())
{
    trigger_error ("Error:" . ingres_errno() . " " . ingres_error(), E_USER_ERROR);
}


Expected result:
----------------
Connecting...done
Sending query...done
testing for error

Fatal error: Error:2117 Table 'aunt_betty' does not exist or 
is not owned by you.

Actual result:
--------------
Connecting...done
Sending query...done
testing for error

Warning: Unknown: ii_success : Server or API error - no 
error message available, status 7 in Unknown on line 0

Warning: Unknown: _close_statement : failed  in Unknown on 
line 0
[Thu Jun  3 10:04:33 2010]  Script:  'notable.php'
/home/grant/src/svn/php/5.2.13/ext/date/php_date.c(566) :  
Freeing 0x0A1822FC (32 bytes), script=notable.php
/home/grant/src/svn/php/5.2.13/Zend/zend_alloc.c(2391) : 
Actual location (location was relayed)
[Thu Jun  3 10:04:33 2010]  Script:  'notable.php'
/home/grant/src/svn/php/5.2.13/ext/date/php_date.c(565) :  
Freeing 0x0A1864B8 (44 bytes), script=notable.php
[Thu Jun  3 10:04:33 2010]  Script:  'notable.php'
/home/grant/src/svn/php/5.2.13/Zend/zend_hash.c(247) :  
Freeing 0x0A187208 (49 bytes), script=notable.php
=== Total 3 memory leaks detected ===