Cleanup: Do not check pointers before deleting them.

fpdfsdk/src/fpdfview.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 "../../core/include/fxcodec/fx_codec.h"
 #include "../../core/include/fxcrt/fx_safe_types.h"
 #include "../../public/fpdf_ext.h"
 #include "../../public/fpdf_progressive.h"
@@ skipping 463 matching lines @@
 
         BitBlt(dc, rect.left, rect.top, width, height, hMemDC, 0, 0, SRCCOPY);
         SelectObject(hMemDC, hOldBitmap);
         DeleteDC(hMemDC);
 
 #ifdef DEBUG_TRACE
         CPDF_ModuleMgr::Get()->ReportError(999, "Finished screen rendering");
 #endif
 
 #endif
-        if (bBackgroundAlphaNeeded)
-        {
-                if (pBitmap)
-                        delete pBitmap;
-                pBitmap = NULL;
-        }
-        delete pContext;
-        pPage->RemovePrivateData((void*)1);
+    if (bBackgroundAlphaNeeded) {
+        delete pBitmap;
+        pBitmap = NULL;
+    }
+    delete pContext;
+    pPage->RemovePrivateData((void*)1);
 }
 #endif
 
 DLLEXPORT void STDCALL FPDF_RenderPageBitmap(FPDF_BITMAP bitmap, FPDF_PAGE page, int start_x, int start_y,
                                                 int size_x, int size_y, int rotate, int flags)
 {
         if (bitmap == NULL || page == NULL) return;
         CPDF_Page* pPage = (CPDF_Page*)page;
 
 
@@ skipping 153 matching lines @@
 }
 
 DLLEXPORT int STDCALL FPDFBitmap_GetStride(FPDF_BITMAP bitmap)
 {
         if (bitmap == NULL) return 0;
         return ((CFX_DIBitmap*)bitmap)->GetPitch();
 }
 
 DLLEXPORT void STDCALL FPDFBitmap_Destroy(FPDF_BITMAP bitmap)
 {
-        if (bitmap == NULL) return;
-        delete (CFX_DIBitmap*)bitmap;
+    delete (CFX_DIBitmap*)bitmap;
 }
 
 void FPDF_RenderPage_Retail(CRenderContext* pContext, FPDF_PAGE page, int start_x, int start_y, int size_x, int size_y,
                                                 int rotate, int flags,FX_BOOL bNeedToRestore, IFSDK_PAUSE_Adapter * pause )
 {
         CPDF_Page* pPage = (CPDF_Page*)page;
         if (pPage == NULL) return;
 
         if (!pContext->m_pOptions)
                 pContext->m_pOptions = new CPDF_RenderOptions;
@@ skipping 183 matching lines @@
     if (!buffer) {
         *buflen = len;
     } else if (*buflen >= len) {
         memcpy(buffer, utf16Name.c_str(), len);
         *buflen = len;
     } else {
         *buflen = -1;
     }
     return (FPDF_DEST)pDestObj;
 }