Get rid of NULLs in fpdfsdk/

fpdfsdk/formfiller/cffl_textfield.cpp

Index: fpdfsdk/formfiller/cffl_textfield.cpp
diff --git a/fpdfsdk/formfiller/cffl_textfield.cpp b/fpdfsdk/formfiller/cffl_textfield.cpp
index 7399651234f2733d562bd9177bf84f73b7e4428a..be1f36b6972a55c8f8f676c3c3822c69fd677145 100644
--- a/fpdfsdk/formfiller/cffl_textfield.cpp
+++ b/fpdfsdk/formfiller/cffl_textfield.cpp
@@ -11,7 +11,7 @@
 #include "fpdfsdk/include/fsdk_mgr.h"
 
 CFFL_TextField::CFFL_TextField(CPDFDoc_Environment* pApp, CPDFSDK_Annot* pAnnot)
-    : CFFL_FormFiller(pApp, pAnnot), m_pFontMap(NULL) {
+    : CFFL_FormFiller(pApp, pAnnot), m_pFontMap(nullptr) {
   m_State.nStart = m_State.nEnd = 0;
 }
 
@@ -30,9 +30,6 @@ PWL_CREATEPARAM CFFL_TextField::GetCreateParam() {
     cp.dwFlags |= PES_PASSWORD;
   }
 
-  if (!(nFlags & FIELDFLAG_DONOTSPELLCHECK)) {
-  }
-
   if (nFlags & FIELDFLAG_MULTILINE) {
     cp.dwFlags |= PES_MULTILINE | PES_AUTORETURN | PES_TOP;
 
@@ -244,7 +241,7 @@ CPWL_Wnd* CFFL_TextField::ResetPDFWindow(CPDFSDK_PageView* pPageView,
 
   DestroyPDFWindow(pPageView);
 
-  CPWL_Wnd* pRet = NULL;
+  CPWL_Wnd* pRet = nullptr;
 
   if (bRestoreValue) {
     RestoreState(pPageView);