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

core/src/fxcodec/codec/fx_codec_jpeg.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 <setjmp.h>
 
 #include "../../../include/fxcodec/fx_codec.h"
 #include "../../../include/fxcrt/fx_safe_types.h"
@@ skipping 203 matching lines @@
     if (cinfo.next_scanline == row) {
       dest_buf =
           FX_Realloc(uint8_t, dest_buf, dest_buf_length + JPEG_BLOCK_SIZE);
       dest.next_output_byte = dest_buf + dest_buf_length - dest.free_in_buffer;
       dest_buf_length += JPEG_BLOCK_SIZE;
       dest.free_in_buffer += JPEG_BLOCK_SIZE;
     }
   }
   jpeg_finish_compress(&cinfo);
   jpeg_destroy_compress(&cinfo);
-  if (line_buf) {
     FX_Free(line_buf);
-  }
   dest_size = dest_buf_length - (FX_STRSIZE)dest.free_in_buffer;
 }
 static FX_BOOL _JpegLoadInfo(const uint8_t* src_buf,
                              FX_DWORD src_size,
                              int& width,
                              int& height,
                              int& num_components,
                              int& bits_per_components,
                              FX_BOOL& color_transform,
                              uint8_t** icc_buf_ptr,
@@ skipping 91 matching lines @@
   FXSYS_memset(&cinfo, 0, sizeof(cinfo));
   FXSYS_memset(&jerr, 0, sizeof(jerr));
   FXSYS_memset(&src, 0, sizeof(src));
   m_nDefaultScaleDenom = 1;
 }
 CCodec_JpegDecoder::~CCodec_JpegDecoder() {
   if (m_pExtProvider) {
     m_pExtProvider->DestroyDecoder(m_pExtContext);
     return;
   }
-  if (m_pScanlineBuf) {
     FX_Free(m_pScanlineBuf);
-  }
   if (m_bInited) {
     jpeg_destroy_decompress(&cinfo);
   }
 }
 FX_BOOL CCodec_JpegDecoder::InitDecode() {
   cinfo.err = &jerr;
   cinfo.client_data = &m_JmpBuf;
   if (setjmp(m_JmpBuf) == -1) {
     return FALSE;
   }
@@ skipping 351 matching lines @@
   }
   if (avail_buf_ptr != NULL) {
     *avail_buf_ptr = NULL;
     if (((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer > 0) {
       *avail_buf_ptr =
           (uint8_t*)((FXJPEG_Context*)pContext)->m_SrcMgr.next_input_byte;
     }
   }
   return (FX_DWORD)((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer;
 }