Represent real remote filesize over 4GB in owncloud 6

owncloud-6-phpseclib-net-sftp.diff

--- SFTP.php    2015-02-06 22:12:50.489904403 +0100
+++ SFTP.php    2015-02-06 22:14:35.188130523 +0100
@@ -1773,12 +1773,16 @@
                     // of course, you shouldn't be using Net_SFTP to transfer files that are in excess of 4GB
                     // (0xFFFFFFFF bytes), anyway.  as such, we'll just represent all file sizes that are bigger than
                     // 4GB as being 4GB.
+//                    extract(unpack('Nupper/Nsize', $this->_string_shift($response, 8)));
+//                    if ($upper) {
+//                        $attr['size'] = 0xFFFFFFFF;
+//                    } else {
+//                        $attr['size'] = $size < 0 ? ($size & 0x7FFFFFFF) + 0x80000000 : $size;
+//                    }
+//                    break;
                     extract(unpack('Nupper/Nsize', $this->_string_shift($response, 8)));
-                    if ($upper) {
-                        $attr['size'] = 0xFFFFFFFF;
-                    } else {
-                        $attr['size'] = $size < 0 ? ($size & 0x7FFFFFFF) + 0x80000000 : $size;
-                    }
+                    $attr['size'] = $upper ? 4294967296 * $upper : 0;
+                    $attr['size']+= $size < 0 ? ($size & 0x7FFFFFFF) + 0x80000000 : $size;
                     break;
                 case NET_SFTP_ATTR_UIDGID: // 0x00000002 (SFTPv3 only)
                     $attr+= unpack('Nuid/Ngid', $this->_string_shift($response, 8));
@@ -2026,4 +2030,4 @@
         $this->pwd = false;
         parent::_disconnect($reason);
     }
-}
\ No newline at end of file
+}