dnsdist: Add missing include for PRId64, fix build on CentOS 6 / SLES 12

diff --git a/pdns/dnsdist-cache.cc b/pdns/dnsdist-cache.cc
index 52829f5a1eb300b7003d000cd51fdbf50695952b..bf092f7309f10b9d38d2b7f2738d5df9bf58560a 100644 (file)
--- a/pdns/dnsdist-cache.cc
+++ b/pdns/dnsdist-cache.cc
@@ -19,6 +19,8 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
+#include <cinttypes>
+
 #include "dnsdist.hh"
 #include "dolog.hh"
 #include "dnsparser.hh"