[OTS] Fix assertion failure on Windows debug build

test/file-stream.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef OTS_FILE_STREAM_H_
 #define OTS_FILE_STREAM_H_
 
 #include "opentype-sanitiser.h"
 
 namespace ots {
@@ skipping 20 matching lines @@
 #if defined(_WIN32)
     if (!::_fseeki64(file_, position, SEEK_SET)) {
       position_ = position;
       return true;
     }
 #else
     if (!::fseeko(file_, position, SEEK_SET)) {
       position_ = position;
       return true;
     }
+#endif  // defined(_WIN32)
     return false;
-#endif  // defined(_WIN32)
   }
 
   off_t Tell() const {
     return position_;
   }
 
  private:
   FILE * const file_;
   off_t position_;
 };
 
 }  // namespace ots
 
 #endif  // OTS_FILE_STREAM_H_