fix deprecation warning in pdo_oci test

Author: mvorisek

ext/pdo_oci/tests/pdo_oci_quote1.phpt

@@ -21,7 +21,7 @@ $stmt = $db->prepare('select * from poq_tab');
 // The intent is that the fetched data be identical to the unquoted string.
 // Remember!: use bind variables instead of PDO->quote()
 
-$a = array(null, "", "a", "ab", "abc", "ab'cd", "a\b\n", "'", "''", "a'", "'z", "a''b", '"');
+$a = array("", "a", "ab", "abc", "ab'cd", "a\b\n", "'", "''", "a'", "'z", "a''b", '"');
 foreach ($a as $u) {
     $q = $db->quote($u);
     echo "Unquoted : ";
@@ -42,15 +42,6 @@ echo "Done\n";
 
 ?>
 --EXPECT--
-Unquoted : NULL
-Quoted   : string(2) "''"
-array(1) {
-  [0]=>
-  array(1) {
-    ["t"]=>
-    NULL
-  }
-}
 Unquoted : string(0) ""
 Quoted   : string(2) "''"
 array(1) {