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

core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp

Index: core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
index 341be13d44a906e666a5c9e77c487ec18385144e..3eac5ae74e53f6c0bba13faff8855469acd1a6c8 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.cpp
@@ -1086,7 +1086,7 @@ void CPDF_StreamAcc::LoadAllData(const CPDF_Stream* pStream, FX_BOOL bRawAccess,
     }
     if (!pStream->IsMemoryBased()) {
         pSrcData = m_pSrcData = FX_Alloc(FX_BYTE, dwSrcSize);
-        if (!pStream->ReadRawData(0, pSrcData, dwSrcSize)) {
+        if (!pSrcData || !pStream->ReadRawData(0, pSrcData, dwSrcSize)) {
             return;
         }
     } else {
@@ -1165,6 +1165,9 @@ FX_LPBYTE CPDF_StreamAcc::DetachData()
         return p;
     }
     FX_LPBYTE p = FX_Alloc(FX_BYTE, m_dwSize);
+    if (p == NULL) {
+        return NULL;
+    }
     FXSYS_memcpy32(p, m_pData, m_dwSize);
     return p;
 }