XFA: merge patch from CL 792953005, fix most VC++ warnings

fpdfsdk/src/fsdk_mgr.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/fsdk_define.h"
 #include "../include/fpdfxfa/fpdfxfa_doc.h"
 #include "../include/fpdfxfa/fpdfxfa_page.h"
 #include "../include/fpdfxfa/fpdfxfa_util.h"
@@ skipping 660 matching lines @@
         CPDFDoc_Environment* pEnv = m_pSDKDoc->GetEnv();
         CPDFXFA_Page* pPage = GetPDFXFAPage();
 
         if (pPage == NULL) return;
 
         if (pPage->GetDocument()->GetDocType() == DOCTYPE_DYNIMIC_XFA) {
                 CFX_Graphics gs;
                 gs.Create(pDevice);
                 if (pClip) {
                         CFX_RectF rectClip;
-                        rectClip.Set(pClip->left, pClip->top, pClip->Width(), pClip->Height());
+                        rectClip.Set(static_cast<FX_FLOAT>(pClip->left),
+                                static_cast<FX_FLOAT>(pClip->top),
+                                static_cast<FX_FLOAT>(pClip->Width()),
+                                static_cast<FX_FLOAT>(pClip->Height()));
                         gs.SetClipRect(rectClip);
                 }       
                 IXFA_RenderContext* pRenderContext = XFA_RenderContext_Create();
                 if (!pRenderContext) 
                         return;
                 CXFA_RenderOptions renderOptions;
                 renderOptions.m_bHighlight = TRUE;
                 pRenderContext->StartRender(pPage->GetXFAPageView(), &gs, *pUser2Device, renderOptions);
                 pRenderContext->DoRender();
                 pRenderContext->StopRender();
@@ skipping 554 matching lines @@
         
         for(int i=0; i<m_fxAnnotArray.GetSize(); i++)
         {
                 CPDFSDK_Annot* pAnnot = (CPDFSDK_Annot*)m_fxAnnotArray.GetAt(i);
                 if(pAnnot == pFocusAnnot)
                         return pAnnot;
         }
         return NULL;
 }