Fix free entry handling for cross reference v4 reading.

core/include/fpdfapi/fpdf_parser.h

Index: core/include/fpdfapi/fpdf_parser.h
diff --git a/core/include/fpdfapi/fpdf_parser.h b/core/include/fpdfapi/fpdf_parser.h
index ad85de4c9a715d7dece2dc210cea524e431bea10..e1e869134e10730a1231188b6f23c18d90f4f1f9 100644
--- a/core/include/fpdfapi/fpdf_parser.h
+++ b/core/include/fpdfapi/fpdf_parser.h
@@ -477,10 +477,7 @@ class CPDF_Parser {
 
   FX_BOOL LoadAllCrossRefV5(FX_FILESIZE pos);
 
-  bool LoadCrossRefV4(FX_FILESIZE pos,
-                      FX_FILESIZE streampos,
-                      FX_BOOL bSkip,
-                      FX_BOOL bFirst);
+  bool LoadCrossRefV4(FX_FILESIZE pos, FX_FILESIZE streampos, FX_BOOL bSkip);
 
   FX_BOOL LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef);