Get rid of NULLs in xfa/

xfa/fde/cfde_txtedtpage.cpp

Index: xfa/fde/cfde_txtedtpage.cpp
diff --git a/xfa/fde/cfde_txtedtpage.cpp b/xfa/fde/cfde_txtedtpage.cpp
index 9ab5386e496788b3841d0c37afc181dab0abb2eb..b8c547fadded5925a0f7dfa23a6629b734bee8b1 100644
--- a/xfa/fde/cfde_txtedtpage.cpp
+++ b/xfa/fde/cfde_txtedtpage.cpp
@@ -138,7 +138,7 @@ int32_t CFDE_TxtEdtPage::GetCharIndex(const CFX_PointF& fPoint,
   }
   NormalizePt2Rect(ptF, rtLine, kTolerance);
   int32_t nCaret = 0;
-  FDE_TEXTEDITPIECE* pPiece = NULL;
+  FDE_TEXTEDITPIECE* pPiece = nullptr;
   for (i = nBgn; i <= nEnd; i++) {
     pPiece = m_PieceMassArr.GetPtrAt(i);
     nCaret = m_nPageStart + pPiece->nStart;
@@ -193,7 +193,7 @@ int32_t CFDE_TxtEdtPage::GetDisplayPos(const CFX_RectF& rtClip,
                                        CFX_RectF* pBBox) const {
   pCharPos = FX_Alloc(FXTEXT_CHARPOS, m_nCharCount);
   int32_t nCharPosCount = 0;
-  FDE_HVISUALOBJ hVisualObj = NULL;
+  FDE_HVISUALOBJ hVisualObj = nullptr;
   int32_t nVisualObjCount = m_PieceMassArr.GetSize();
   FXTEXT_CHARPOS* pos = pCharPos;
   CFX_RectF rtObj;
@@ -323,15 +323,12 @@ int32_t CFDE_TxtEdtPage::LoadPage(const CFX_RectF* pClipBox,
   FX_FLOAT fLineStep =
       (bVertial && bLineReserve) ? (-pParams->fLineSpace) : pParams->fLineSpace;
   FX_FLOAT fLinePos = fLineStart;
-  if (m_pTextSet == NULL) {
+  if (!m_pTextSet)
     m_pTextSet = new CFDE_TxtEdtTextSet(this);
-  }
   m_PieceMassArr.RemoveAll(TRUE);
   uint32_t dwBreakStatus = FX_TXTBREAK_None;
   int32_t nPieceStart = 0;
-  if (m_pCharWidth != NULL) {
-    delete[] m_pCharWidth;
-  }
+  delete[] m_pCharWidth;
   m_pCharWidth = new int32_t[nPageEnd - nPageStart + 1];
   pBreak->EndBreak(FX_TXTBREAK_ParagraphBreak);
   pBreak->ClearBreakPieces();
@@ -486,7 +483,7 @@ const CFX_RectF& CFDE_TxtEdtPage::GetContentsBox() {
 
 FX_POSITION CFDE_TxtEdtPage::GetFirstPosition(FDE_HVISUALOBJ hCanvas) {
   if (m_PieceMassArr.GetSize() < 1) {
-    return NULL;
+    return nullptr;
   }
   return (FX_POSITION)1;
 }
@@ -494,14 +491,14 @@ FX_POSITION CFDE_TxtEdtPage::GetFirstPosition(FDE_HVISUALOBJ hCanvas) {
 FDE_HVISUALOBJ CFDE_TxtEdtPage::GetNext(FDE_HVISUALOBJ hCanvas,
                                         FX_POSITION& pos,
                                         IFDE_VisualSet*& pVisualSet) {
-  if (m_pTextSet == NULL) {
-    pos = NULL;
-    return NULL;
+  if (!m_pTextSet) {
+    pos = nullptr;
+    return nullptr;
   }
   int32_t nPos = (int32_t)(uintptr_t)pos;
   pVisualSet = m_pTextSet;
   if (nPos + 1 > m_PieceMassArr.GetSize()) {
-    pos = NULL;
+    pos = nullptr;
   } else {
     pos = (FX_POSITION)(uintptr_t)(nPos + 1);
   }
@@ -510,7 +507,7 @@ FDE_HVISUALOBJ CFDE_TxtEdtPage::GetNext(FDE_HVISUALOBJ hCanvas,
 
 FDE_HVISUALOBJ CFDE_TxtEdtPage::GetParentCanvas(FDE_HVISUALOBJ hCanvas,
                                                 IFDE_VisualSet*& pVisualSet) {
-  return NULL;
+  return nullptr;
 }
 
 FX_WCHAR CFDE_TxtEdtPage::GetChar(void* pIdentity, int32_t index) const {