Simplify CPDF_TextPage::FindTextlineFlowOrientation().

fpdfsdk/fpdf_flatten.cpp

Index: fpdfsdk/fpdf_flatten.cpp
diff --git a/fpdfsdk/fpdf_flatten.cpp b/fpdfsdk/fpdf_flatten.cpp
index bc1a1ccc60676fba5f5561e85b7c706e6fb2177e..7d2d23a921f53c4f3233a8ea36bec4557687835f 100644
--- a/fpdfsdk/fpdf_flatten.cpp
+++ b/fpdfsdk/fpdf_flatten.cpp
@@ -48,10 +48,7 @@ void GetContentsRect(CPDF_Document* pDoc,
   std::unique_ptr<CPDF_Page> pPDFPage(new CPDF_Page(pDoc, pDict, false));
   pPDFPage->ParseContent();
 
-  for (auto& pPageObject : *pPDFPage->GetPageObjectList()) {
-    if (!pPageObject)
-      continue;
-
+  for (const auto& pPageObject : *pPDFPage->GetPageObjectList()) {
     CFX_FloatRect rc;
     rc.left = pPageObject->m_Left;
     rc.right = pPageObject->m_Right;