Including sys/types.h for MacOS X

This commit was SVN r2041.

src/util/pack.c

@@ -9,6 +9,7 @@
  */
 #include <string.h>
 #include <stdlib.h>
+#include <sys/types.h>
 #include <sys/uio.h>
 #include <netinet/in.h>