Fix undeclared variables (found by https://github.com/facebook/hiphop-php analyzer)

Author: vrana

S3.php

@@ -728,7 +728,7 @@ public static function setBucketLogging($bucket, $targetBucket, $targetPrefix =
 			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
 		if ($rest->error !== false)
 		{
-			self::__triggerError(sprintf("S3::setBucketLogging({$bucket}, {$uri}): [%s] %s",
+			self::__triggerError(sprintf("S3::setBucketLogging({$bucket}, {$targetBucket}): [%s] %s",
 			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);
 			return false;
 		}
@@ -1773,7 +1773,7 @@ public function getResponse()
 		{
 			curl_setopt($curl, CURLOPT_PROXY, S3::$proxy['host']);
 			curl_setopt($curl, CURLOPT_PROXYTYPE, S3::$proxy['type']);
-			if (isset(S3::$proxy['user'], S3::$proxy['pass']) && $proxy['user'] != null && $proxy['pass'] != null)
+			if (isset(S3::$proxy['user'], S3::$proxy['pass']) && S3::$proxy['user'] != null && S3::$proxy['pass'] != null)
 				curl_setopt($curl, CURLOPT_PROXYUSERPWD, sprintf('%s:%s', S3::$proxy['user'], S3::$proxy['pass']));
 		}