Include utils.h from pgp.c
This fixes a compilation warning.
--- a/mcabber/mcabber/pgp.c Sat Nov 21 18:23:30 2015 +0100
+++ b/mcabber/mcabber/pgp.c Sat Nov 21 18:29:15 2015 +0100
@@ -33,6 +33,7 @@
#include "pgp.h"
#include "settings.h"
+#include "utils.h"
#include "logprint.h"
#define MIN_GPGME_VERSION "1.1.0"