Include missing file (bug #3277)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4712 65c4cc65-6c06-0410-ace0-fbb531ad65f3

utils.c

@@ -17,6 +17,7 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <errno.h>
+#include <stdio.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>