Fix windows-specific usage of CFX_WideStr::operator LPCWSTR().

core/include/fxge/fx_ge_win32.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
  
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef _FX_GE_WIN32_H_
 #define _FX_GE_WIN32_H_
 #ifdef _WIN32
 #ifndef _WINDOWS_
@@ skipping 20 matching lines @@
     static CFX_DIBitmap* LoadFromBuf(BITMAPINFO* pbmi, void* pData);
 
     static HBITMAP              GetDDBitmap(const CFX_DIBitmap* pBitmap, HDC hDC);
 
     static CFX_DIBitmap* LoadFromDDB(HDC hDC, HBITMAP hBitmap, FX_DWORD* pPalette = NULL, FX_DWORD size = 256);
 
     static CFX_DIBitmap* LoadFromFile(FX_LPCWSTR filename);
 
     static CFX_DIBitmap* LoadFromFile(FX_LPCSTR filename)
     {
-        return LoadFromFile(CFX_WideString::FromLocal(filename));
+        return LoadFromFile(CFX_WideString::FromLocal(filename).c_str());
     }
 
     static CFX_DIBitmap* LoadDIBitmap(WINDIB_Open_Args_ args);
 
     CFX_WindowsDIB(HDC hDC, int width, int height);
 
     ~CFX_WindowsDIB();
 
     HDC                                 GetDC() const
     {
@@ skipping 44 matching lines @@
 protected:
 
     HBITMAP     m_hBitmap;
 
     HBITMAP m_hOldBitmap;
 
     HDC         m_hDC;
 };
 #endif
 #endif