[dev] registry.php - better handling of some boolean value

[steve]

About lib/registry.php, it seems that for PHP 4.3.2 for Windows, the 
$return value doesn't work correctly if there is an error in the include 
file. Here is a workaround that makes the code a little bit cleaner:
742c752,753
<                 if (!$success) {
---
 >                 }
 >                 if ($success === false) {
765c776
<                 if (!$success) {
---
 >                 if ($success === false) {
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<