File add-cstring-include.patch of Package cups-filters.29003

Index: cups-filters-1.25.0/filter/pdf.cxx
===================================================================
--- cups-filters-1.25.0.orig/filter/pdf.cxx
+++ cups-filters-1.25.0/filter/pdf.cxx
@@ -19,6 +19,7 @@
 #include <config.h>
 #include "pdf.h"
 #include <vector>
+#include <cstring>
 #include <string>
 #include <qpdf/QPDF.hh>
 #include <qpdf/QPDFObjectHandle.hh>