Don't bother checking pointers before delete[] and FX_Free().

core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.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 "../../../../third_party/base/nonstd_unique_ptr.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_pageobj.h"
 #include "../../../include/fpdfapi/fpdf_render.h"
@@ skipping 164 matching lines @@
   m_MatteColor = 0;
   m_pJbig2Context = NULL;
   m_pGlobalStream = NULL;
   m_bStdCS = FALSE;
   m_pMaskStream = NULL;
   m_Status = 0;
   m_bHasMask = FALSE;
 }
 CPDF_DIBSource::~CPDF_DIBSource() {
   delete m_pStreamAcc;
-  if (m_pMaskedLine) {
     FX_Free(m_pMaskedLine);
-  }
-  if (m_pLineBuf) {
     FX_Free(m_pLineBuf);
-  }
   m_pCachedBitmap.reset();
   delete m_pDecoder;
-  if (m_pCompData) {
     FX_Free(m_pCompData);
-  }
   CPDF_ColorSpace* pCS = m_pColorSpace;
   if (pCS && m_pDocument) {
     m_pDocument->GetPageData()->ReleaseColorSpace(pCS->GetArray());
   }
   if (m_pJbig2Context) {
     ICodec_Jbig2Module* pJbig2Module = CPDF_ModuleMgr::Get()->GetJbig2Module();
     pJbig2Module->DestroyJbig2Context(m_pJbig2Context);
   }
   delete m_pGlobalStream;
 }
@@ skipping 1439 matching lines @@
 }
 FX_BOOL CPDF_ImageLoader::Continue(void* LoadHandle, IFX_Pause* pPause) {
   return ((CPDF_ProgressiveImageLoaderHandle*)LoadHandle)->Continue(pPause);
 }
 CPDF_ImageLoader::~CPDF_ImageLoader() {
   if (!m_bCached) {
     delete m_pBitmap;
     delete m_pMask;
   }
 }