From b6c8d9da5e882a1509c6ce462893afcfb142ebde Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 27 Jul 2019 11:05:45 +0530
Subject: [PATCH] Dont bother hashing object numbers, just use them directly as
 the hash

---
 src/calibre/utils/podofo/global.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/utils/podofo/global.h b/src/calibre/utils/podofo/global.h
index 6e24796cbb..c8eae1dbb5 100644
--- a/src/calibre/utils/podofo/global.h
+++ b/src/calibre/utils/podofo/global.h
@@ -89,7 +89,7 @@ dictionary_has_key_name(const PdfDictionary &d, T key, const char *name) {
 class PdfReferenceHasher {
     public:
         size_t operator()(const PdfReference & obj) const {
-            return std::hash<pdf_objnum>()(obj.ObjectNumber());
+            return obj.ObjectNumber();
         }
 };
 typedef std::unordered_set<PdfReference, PdfReferenceHasher> unordered_reference_set;