Pass nullptr to ParseContentWithParams() instead of 0.

Change-Id: I4ec48652d41cea9a79b6711c08484965ceea7587
Reviewed-on: https://pdfium-review.googlesource.com/24130
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/core/fpdfapi/font/cpdf_type3font.cpp b/core/fpdfapi/font/cpdf_type3font.cpp
index c328c10..b3eaef0 100644
--- a/core/fpdfapi/font/cpdf_type3font.cpp
+++ b/core/fpdfapi/font/cpdf_type3font.cpp
@@ -115,7 +115,8 @@
   // can change as a result. Thus after it returns, check the cache again for
   // a cache hit.
   m_CharLoadingDepth++;
-  pNewChar->form()->ParseContentWithParams(nullptr, nullptr, pNewChar.get(), 0);
+  pNewChar->form()->ParseContentWithParams(nullptr, nullptr, pNewChar.get(),
+                                           nullptr);
   m_CharLoadingDepth--;
   it = m_CacheMap.find(charcode);
   if (it != m_CacheMap.end())
diff --git a/core/fpdfapi/page/cpdf_tilingpattern.cpp b/core/fpdfapi/page/cpdf_tilingpattern.cpp
index a525257..02127b6 100644
--- a/core/fpdfapi/page/cpdf_tilingpattern.cpp
+++ b/core/fpdfapi/page/cpdf_tilingpattern.cpp
@@ -49,7 +49,7 @@
 
   const CFX_Matrix& matrix = parent_matrix();
   m_pForm = pdfium::MakeUnique<CPDF_Form>(document(), nullptr, pStream);
-  m_pForm->ParseContentWithParams(nullptr, &matrix, nullptr, 0);
+  m_pForm->ParseContentWithParams(nullptr, &matrix, nullptr, nullptr);
   m_BBox = pDict->GetRectFor("BBox");
   return true;
 }