Description:
------------
fread/feof doesn't detect the end of file using the sftp wrapper.
an infinite loop occurcs when trying to read files.

OS: Ubuntu 10.4 TLS
PHP version : 5.3.2-1ubuntu4.5
openssh-server : 1:5.3p1-3ubuntu4

Test script:
---------------
#!/usr/bin/php
<?php
$connection = ssh2_connect('my.hostname.com', 22);
ssh2_auth_password($connection, 'mylogin', 'mypassword');
$sftp = ssh2_sftp($connection);
$stream = fopen('ssh2.sftp://'.$sftp.'/home/mylogin/test', 'w');
fwrite($stream, "bob");
fclose($stream);

print_r(file_get_contents('ssh2.sftp://'.$sftp.'/home/mylogin/test')); //Works fine !

$source_handle = fopen('ssh2.sftp://'.$sftp.'/home/mylogin/test', "r");
if($source_handle){
	while (!feof($source_handle)) { //Infinite loop
		$buffer = fread($source_handle,1024);
        	echo "*".$buffer."*";
	}
	fclose($source_handle);
}
?>

Expected result:
----------------
bob*bob*

Actual result:
--------------
bob*bob*********************************************... and so on.