Fix Wvarargs warning in XFA error code.

xfa/fxfa/fm2js/xfa_fmparse.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 XFA_FXFA_FM2JS_XFA_FMPARSE_H_
 #define XFA_FXFA_FM2JS_XFA_FMPARSE_H_
 
 #include <memory>
 
 #include "xfa/fxfa/fm2js/xfa_expression.h"
 #include "xfa/fxfa/fm2js/xfa_lexer.h"
 
 class CXFA_FMParse {
  public:
   CXFA_FMParse();
   int32_t Init(const CFX_WideStringC& wsFormcalc, CXFA_FMErrorInfo* pErrorInfo);
   void NextToken();
   void Check(XFA_FM_TOKEN op);
-  void Error(uint32_t lineNum, XFA_FM_ERRMSG msg, ...);
+  void Error(uint32_t lineNum, const FX_WCHAR* msg, ...);
   CFX_PtrArray* ParseTopExpression();
   CXFA_FMExpression* ParseFunction();
   CXFA_FMExpression* ParseExpression();
   CXFA_FMExpression* ParseVarExpression();
   CXFA_FMExpression* ParseExpExpression();
   CXFA_FMExpression* ParseBlockExpression();
   CXFA_FMExpression* ParseIfExpression();
   CXFA_FMExpression* ParseWhileExpression();
   CXFA_FMExpression* ParseForExpression();
   CXFA_FMExpression* ParseForeachExpression();
@@ skipping 12 matching lines @@
   CXFA_FMSimpleExpression* ParsePostExpression(CXFA_FMSimpleExpression* e);
   CXFA_FMSimpleExpression* ParseIndexExpression();
 
  private:
   std::unique_ptr<CXFA_FMLexer> m_lexer;
   CXFA_FMToken* m_pToken;
   CXFA_FMErrorInfo* m_pErrorInfo;
 };
 
 #endif  // XFA_FXFA_FM2JS_XFA_FMPARSE_H_