Clean up more XFA code which causes warnings

xfa/fxfa/app/xfa_fffield.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 "xfa/fxfa/app/xfa_fffield.h"
 
 #include "xfa/fwl/basewidget/ifwl_edit.h"
 #include "xfa/fwl/core/cfwl_message.h"
@@ skipping 432 matching lines @@
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
   ms.m_pDstTarget = m_pNormalWidget->m_pIface;
   TranslateFWLMessage(&ms);
   return TRUE;
 }
 FX_BOOL CXFA_FFField::OnMouseWheel(uint32_t dwFlags,
                                    int16_t zDelta,
                                    FX_FLOAT fx,
                                    FX_FLOAT fy) {
-  return FALSE;

[Tom Sepez, 2016/05/23 16:57:54]

hahahaha

   if (!m_pNormalWidget) {
     return FALSE;
   }
   CFWL_MsgMouseWheel ms;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
   ms.m_fDeltaX = zDelta;
   ms.m_fDeltaY = 0;
@@ skipping 356 matching lines @@
       m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_Click, &eParam);
       break;
     }
     default:
       break;
   }
 }
 
 void CXFA_FFField::OnDrawWidget(CFX_Graphics* pGraphics,
                                 const CFX_Matrix* pMatrix) {}