handle 0 as default value

1 files changed, 1 insertions, 1 deletions

diff --git a/it.class b/it.class
index b533c3f..fa881ff 100644
--- a/it.class
+++ b/it.class
@@ -770,7 +770,7 @@ static function getopt($usage, $p = array())
 				list($shortoptname, $shortoptarg) = $matches;
 		}	
 
-		if ($default = it::match('\[(.*)\]\s*$', $usageline))
+		if (($default = it::match('\[(.*)\]\s*$', $usageline)) !== null)
 		{
 			if ($longoptarg || $shortoptarg)
 				$defaults[$longoptname ? $longoptname : $shortoptname] = it::replace(array('^default:?\s*' => ""), trim($default));