XFA: Fix two minor build errors on Windows

xfa/src/fgas/include/fx_fnt.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_FONT
 #define _FX_FONT
 class IFX_Font;
 class IFX_FontMgr;
@@ skipping 120 matching lines @@
 FX_LPEnumAllFonts FX_GetDefFontEnumerator();
 typedef FX_LPCFONTDESCRIPTOR (*FX_LPMatchFont)(FX_LPFONTMATCHPARAMS pParams,
                                                const CFX_FontDescriptors& fonts,
                                                void* pUserData);
 FX_LPMatchFont FX_GetDefFontMatchor();
 class IFX_FontMgr {
  public:
   static IFX_FontMgr* Create(FX_LPEnumAllFonts pEnumerator,
                              FX_LPMatchFont pMatcher = NULL,
                              void* pUserData = NULL);
-  ~virtual ~IFX_FontMgr() {}
+  virtual ~IFX_FontMgr() {}
   virtual void Release() = 0;
   virtual IFX_Font* GetDefFontByCodePage(
       FX_WORD wCodePage,
       FX_DWORD dwFontStyles,
       const FX_WCHAR* pszFontFamily = NULL) = 0;
   virtual IFX_Font* GetDefFontByCharset(
       uint8_t nCharset,
       FX_DWORD dwFontStyles,
       const FX_WCHAR* pszFontFamily = NULL) = 0;
   virtual IFX_Font* GetDefFontByUnicode(
@@ skipping 103 matching lines @@
   virtual IFX_Font* LoadFont(IFX_Stream* pFontStream,
                              int32_t iFaceIndex,
                              int32_t* pFaceCount = NULL,
                              FX_BOOL bSaveStream = FALSE) = 0;
 
   virtual void ClearFontCache() = 0;
   virtual void RemoveFont(IFX_Font* pFont) = 0;
 };
 #endif
 #endif