Prevent warnings from -Wmissing-prototypes.

util/rfc_1982.c

@@ -39,6 +39,7 @@
  * This file contains functions for RFC 1982 serial number arithmetic.
  */
 #include "config.h"
+#include "util/rfc_1982.h"
 
 int
 compare_1982(uint32_t a, uint32_t b)

util/siphash.c

@@ -26,6 +26,11 @@
  */
 #include "config.h"
 
+/** EDIT
+  * prevent warning from -Wmissing-prototypes
+  */
+#include "util/siphash.h"
+
 /* default: SipHash-2-4 */
 #define cROUNDS 2
 #define dROUNDS 4