Get rid of NULLs in core/

core/fxcodec/codec/fx_codec_jpeg.cpp

Index: core/fxcodec/codec/fx_codec_jpeg.cpp
diff --git a/core/fxcodec/codec/fx_codec_jpeg.cpp b/core/fxcodec/codec/fx_codec_jpeg.cpp
index c41dde943f040e9ad866dfa4950e70b9845c00f3..4f4bdb196c47b32b7b2154614d106aaa6c7efb58 100644
--- a/core/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/fxcodec/codec/fx_codec_jpeg.cpp
@@ -182,7 +182,7 @@ static void _JpegEncode(const CFX_DIBSource* pSource,
   } else {
     cinfo.in_color_space = JCS_CMYK;
   }
-  uint8_t* line_buf = NULL;
+  uint8_t* line_buf = nullptr;
   if (nComponents > 1) {
     line_buf = FX_Alloc2D(uint8_t, width, nComponents);
   }
@@ -234,9 +234,6 @@ static void _JpegEncode(const CFX_DIBSource* pSource,
 #ifdef PDF_ENABLE_XFA
 static void _JpegLoadAttribute(struct jpeg_decompress_struct* pInfo,
                                CFX_DIBAttribute* pAttribute) {
-  if (pInfo == NULL || pAttribute == NULL) {
-    return;
-  }
   if (pAttribute) {
     pAttribute->m_nXDPI = pInfo->X_density;
     pAttribute->m_nYDPI = pInfo->Y_density;
@@ -298,7 +295,7 @@ static FX_BOOL _JpegLoadInfo(const uint8_t* src_buf,
       cinfo.jpeg_color_space == JCS_YCbCr || cinfo.jpeg_color_space == JCS_YCCK;
   bits_per_components = cinfo.data_precision;
   if (icc_buf_ptr) {
-    *icc_buf_ptr = NULL;
+    *icc_buf_ptr = nullptr;
   }
   if (icc_length) {
     *icc_length = 0;
@@ -343,7 +340,7 @@ class CCodec_JpegDecoder : public CCodec_ScanlineDecoder {
 };
 
 CCodec_JpegDecoder::CCodec_JpegDecoder() {
-  m_pScanlineBuf = NULL;
+  m_pScanlineBuf = nullptr;
   m_bStarted = FALSE;
   m_bInited = FALSE;
   FXSYS_memset(&cinfo, 0, sizeof(cinfo));
@@ -483,13 +480,13 @@ CCodec_ScanlineDecoder* CCodec_JpegModule::CreateDecoder(
     int nComps,
     FX_BOOL ColorTransform) {
   if (!src_buf || src_size == 0) {
-    return NULL;
+    return nullptr;
   }
   CCodec_JpegDecoder* pDecoder = new CCodec_JpegDecoder;
   if (!pDecoder->Create(src_buf, src_size, width, height, nComps,
                         ColorTransform)) {
     delete pDecoder;
-    return NULL;
+    return nullptr;
   }
   return pDecoder;
 }
@@ -647,7 +644,7 @@ FX_BOOL CCodec_JpegModule::ReadScanline(FXJPEG_Context* ctx,
 uint32_t CCodec_JpegModule::GetAvailInput(FXJPEG_Context* ctx,
                                           uint8_t** avail_buf_ptr) {
   if (avail_buf_ptr) {
-    *avail_buf_ptr = NULL;
+    *avail_buf_ptr = nullptr;
     if (ctx->m_SrcMgr.bytes_in_buffer > 0) {
       *avail_buf_ptr = (uint8_t*)ctx->m_SrcMgr.next_input_byte;
     }