Add PDFCharIsLineEnding helper

core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp

Index: core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
index 27d8c24f15889af6c6eddacbad587d28408c3f3f..411b323c88f4e6bb79fdcbb75cdd7fffc7e44d54 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
@@ -478,7 +478,7 @@ CPDF_StreamParser::SyntaxType CPDF_StreamParser::ParseNextElement() {
         return EndOfData;
 
       ch = m_pBuf[m_Pos++];
-      if (ch == '\r' || ch == '\n')
+      if (PDFCharIsLineEnding(ch))
         break;
     }
   }
@@ -698,7 +698,7 @@ void CPDF_StreamParser::GetNextWord(FX_BOOL& bIsNumber) {
       if (m_Size <= m_Pos)
         return;
       ch = m_pBuf[m_Pos++];
-      if (ch == '\r' || ch == '\n')
+      if (PDFCharIsLineEnding(ch))
         break;
     }
   }