Avoid casts via correct types in fgas_textbreak

xfa/fxfa/app/xfa_rendercontext.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/include/xfa_rendercontext.h"
 
 #include "xfa/fxfa/include/xfa_ffpageview.h"
 #include "xfa/fxfa/include/xfa_ffwidget.h"
@@ skipping 33 matching lines @@
                                               : XFA_WidgetStatus_Viewable);
   m_pWidgetIterator.reset(
       m_pPageView->CreateWidgetIterator(XFA_TRAVERSEWAY_Form, dwFilterType));
   m_pWidget = m_pWidgetIterator->MoveToNext();
   return XFA_RENDERSTATUS_Ready;
 }
 
 int32_t CXFA_RenderContext::DoRender(IFX_Pause* pPause) {
   int32_t iCount = 0;
   while (m_pWidget) {
-    CXFA_FFWidget* pWidget = (CXFA_FFWidget*)m_pWidget;
+    CXFA_FFWidget* pWidget = m_pWidget;
     CFX_RectF rtWidgetBox;
     pWidget->GetBBox(rtWidgetBox, XFA_WidgetStatus_Visible);
     rtWidgetBox.width += 1;
     rtWidgetBox.height += 1;
     if (rtWidgetBox.IntersectWith(m_rtClipRect))
       pWidget->RenderWidget(m_pGS, &m_matrix, m_dwStatus);
     m_pWidget = m_pWidgetIterator->MoveToNext();
     iCount++;
     if (iCount > kMaxCount && pPause && pPause->NeedToPauseNow())
       return XFA_RENDERSTATUS_ToBeContinued;
   }
   return XFA_RENDERSTATUS_Done;
 }
 
 void CXFA_RenderContext::StopRender() {
   m_pWidgetIterator.reset();
 }