Revert "Remove FX_Alloc() null checks now that it can't return NULL."

core/src/fxge/ge/fx_ge_ps.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 "../../../include/fxge/fx_ge.h"
 #include "../../../include/fxcodec/fx_codec.h"
 #include "text_int.h"
 struct PSGlyph {
@@ skipping 331 matching lines @@
     buf << FX_BSTRC("[") << pMatrix->a << FX_BSTRC(" ") << pMatrix->b << FX_BSTRC(" ") <<
         pMatrix->c << FX_BSTRC(" ") << pMatrix->d << FX_BSTRC(" ") << pMatrix->e <<
         FX_BSTRC(" ") << pMatrix->f << FX_BSTRC("]cm ");
     int width = pSource->GetWidth();
     int height = pSource->GetHeight();
     buf << width << FX_BSTRC(" ") << height;
     if (pSource->GetBPP() == 1 && pSource->GetPalette() == NULL) {
         int pitch = (width + 7) / 8;
         FX_DWORD src_size = height * pitch;
         FX_LPBYTE src_buf = FX_Alloc(FX_BYTE, src_size);
+        if (!src_buf) {
+            return FALSE;
+        }
         for (int row = 0; row < height; row ++) {
             FX_LPCBYTE src_scan = pSource->GetScanline(row);
             FXSYS_memcpy32(src_buf + row * pitch, src_scan, pitch);
         }
         FX_LPBYTE output_buf;
         FX_DWORD output_size;
         FaxCompressData(src_buf, width, height, output_buf, output_size);
         if (pSource->IsAlphaMask()) {
             SetColor(color, alpha_flag, pIccTransform);
             m_bColorSet = FALSE;
@@ skipping 53 matching lines @@
         if (flags & FXRENDER_IMAGE_LOSSY) {
             CCodec_ModuleMgr* pEncoders = CFX_GEModule::Get()->GetCodecModule();
             if (pEncoders && pEncoders->GetJpegModule()->Encode(pConverted, output_buf, output_size)) {
                 filter = "/DCTDecode filter ";
             }
         }
         if (filter == NULL) {
             int src_pitch = width * Bpp;
             output_size = height * src_pitch;
             output_buf = FX_Alloc(FX_BYTE, output_size);
+            if (!output_buf) {
+                if (pConverted != pSource) {
+                    delete pConverted;
+                    pConverted = NULL;
+                }
+                return FALSE;
+            }
             for (int row = 0; row < height; row ++) {
                 FX_LPCBYTE src_scan = pConverted->GetScanline(row);
                 FX_LPBYTE dest_scan = output_buf + row * src_pitch;
                 if (Bpp == 3) {
                     for (int col = 0; col < width; col ++) {
                         *dest_scan++ = src_scan[2];
                         *dest_scan++ = src_scan[1];
                         *dest_scan++ = *src_scan;
                         src_scan += 3;
                     }
@@ skipping 200 matching lines @@
     FX_LPBYTE dest_buf;
     FX_DWORD dest_size;
     CCodec_ModuleMgr* pEncoders = CFX_GEModule::Get()->GetCodecModule();
     if (pEncoders && pEncoders->GetBasicModule()->A85Encode(data, len, dest_buf, dest_size)) {
         m_pOutput->OutputPS((FX_LPCSTR)dest_buf, dest_size);
         FX_Free(dest_buf);
     } else {
         m_pOutput->OutputPS((FX_LPCSTR)data, len);
     }
 }