Fix breakage on window in previous version.

samples/pdfium_test.cc

 // Copyright (c) 2010 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.
 
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <wchar.h>
 
@@ skipping 437 matching lines @@
     const char* buffer =
         reinterpret_cast<const char*>(FPDFBitmap_GetBuffer(bitmap));
 
     switch (format) {
 #ifdef _WIN32
       case OUTPUT_BMP:
         WriteBmp(name.c_str(), i, buffer, stride, width, height);
         break;
 
       case OUTPUT_EMF:
-        WriteEmf(page.c_str(), name, i);
+        WriteEmf(page, name.c_str(), i);
         break;
 #endif
       case OUTPUT_PPM:
         WritePpm(name.c_str(), i, buffer, stride, width, height);
         break;
       default:
         break;
     }
 
     FPDFBitmap_Destroy(bitmap);
@@ skipping 58 matching lines @@
     if (!file_contents)
       continue;
     RenderPdf(filename, file_contents, file_length, options.output_format);
     free(file_contents);
   }
 
   FPDF_DestroyLibrary();
 
   return 0;
 }