Get rid of FX_LPCSTR cast.

fpdfsdk/src/formfiller/FFL_TextField.cpp

 // 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
 
 //#include "../include/FormFiller.h"
 //#include "../include/FFL_FormFiller.h"
 #include "../../include/formfiller/FFL_TextField.h"
 #include "../../include/formfiller/FFL_CBA_Fontmap.h"
@@ skipping 346 matching lines @@
         if (pWnd->GetClassName() == PWL_CLASSNAME_EDIT)
         {
                 CPWL_Edit* pEdit = (CPWL_Edit*)pWnd;
                 pEdit->SetCharSet(134);
                 pEdit->SetCodePage(936);
  
                 pEdit->SetReadyToInput();
                 CFX_WideString wsText = pEdit->GetText();
                 int nCharacters = wsText.GetLength();
                 CFX_ByteString bsUTFText = wsText.UTF16LE_Encode();
-                unsigned short* pBuffer = (unsigned short*)(FX_LPCSTR)bsUTFText;
+                unsigned short* pBuffer = (unsigned short*)bsUTFText.c_str();
                 m_pApp->FFI_OnSetFieldInputFocus(m_pWidget->GetFormField(), pBuffer, nCharacters, TRUE);
  
                 pEdit->SetEditNotify(this);
                 //pUndo->BeginEdit(pDocument);
         }
 }
 
 void CFFL_TextField::OnKillFocus(CPWL_Wnd* pWnd)
 {
 
@@ skipping 25 matching lines @@
 
 void CFFL_TextField::DoPaste(CPDFSDK_Document* pDocument)
 {
 
 }
 
 void CFFL_TextField::OnAddUndo(CPWL_Edit* pEdit)
 {
 }