Get rid of most instance of 'foo == NULL'

core/src/fxge/android/fpf_skiafontmgr.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 "core/include/fxcrt/fx_ext.h"
 #include "fx_fpf.h"
 
 #if _FX_OS_ == _FX_ANDROID_
@@ skipping 220 matching lines @@
     CFPF_SkiaFontDescriptor* pFont =
         (CFPF_SkiaFontDescriptor*)m_FontFaces.ElementAt(i);
     delete pFont;
   }
   m_FontFaces.RemoveAll();
   if (m_FTLibrary) {
     FXFT_Done_FreeType(m_FTLibrary);
   }
 }
 FX_BOOL CFPF_SkiaFontMgr::InitFTLibrary() {
-  if (m_FTLibrary == NULL) {
+  if (!m_FTLibrary) {
     FXFT_Init_FreeType(&m_FTLibrary);
   }
   return m_FTLibrary != NULL;
 }
 void CFPF_SkiaFontMgr::LoadSystemFonts() {
   if (m_bLoaded) {
     return;
   }
   ScanPath("/system/fonts");
   OutputSystemFonts();
@@ skipping 270 matching lines @@
   }
   if (pOS2 && (pOS2->ulCodePageRange1 & (1 << 31))) {
     pFontDesc->m_dwStyle |= FXFONT_SYMBOLIC;
   }
   pFontDesc->m_dwCharsets = FPF_SkiaGetFaceCharset(pOS2);
   pFontDesc->m_iFaceIndex = face->face_index;
   pFontDesc->m_iGlyphNum = face->num_glyphs;
 }
 void CFPF_SkiaFontMgr::OutputSystemFonts() {}
 #endif