Don't add bogus entries when pdf_update_object is called with NULL.

Treat such calls as deleting the object, as per pdf_delete_object.

1 files changed, 6 insertions, 0 deletions

diff --git a/source/pdf/pdf-xref.c b/source/pdf/pdf-xref.c
index 6db54472..b20aaee4 100644
--- a/source/pdf/pdf-xref.c
+++ b/source/pdf/pdf-xref.c
@@ -2128,6 +2128,12 @@ pdf_update_object(fz_context *ctx, pdf_document *doc, int num, pdf_obj *newobj)
 		return;
 	}
 
+	if (!newobj)
+	{
+		pdf_delete_object(ctx, doc, num);
+		return;
+	}
+
 	x = pdf_get_incremental_xref_entry(ctx, doc, num);
 
 	pdf_drop_obj(ctx, x->obj);