[seahorse] Meson: fix non-existant pgp_dep if disabled.

[Niels De Graef <nielsdg src gnome org>]

commit 27fd5066895055948b8932115a1572294a367e96
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Tue Nov 21 20:04:50 2017 +0100

    Meson: fix non-existant pgp_dep if disabled.

 libseahorse/Makefile.am     |   93 -------------------------------------------
 libseahorse/meson.build     |    5 ++-
 libseahorse/seahorse-util.c |    2 +
 3 files changed, 6 insertions(+), 94 deletions(-)
---
diff --git a/libseahorse/meson.build b/libseahorse/meson.build
index 15f1682..15f2922 100644
--- a/libseahorse/meson.build
+++ b/libseahorse/meson.build
@@ -36,9 +36,12 @@ libseahorse_deps = [
   libtreemultidnd_dep,
   common_dep,
   ssh_dep,
-  pgp_dep,
 ]
 
+if with_pgp
+  libseahorse_deps += pgp_dep
+endif
+
 libseahorse_lib = static_library('libseahorse',
   libseahorse_sources,
   dependencies: libseahorse_deps,
diff --git a/libseahorse/seahorse-util.c b/libseahorse/seahorse-util.c
index c229ab8..f054cd7 100644
--- a/libseahorse/seahorse-util.c
+++ b/libseahorse/seahorse-util.c
@@ -26,7 +26,9 @@
 #include "seahorse-util.h"
 #include "seahorse-widget.h"
 
+#if WITH_PGP
 #include "pgp/seahorse-pgp.h"
+#endif
 
 #include "ssh/seahorse-ssh.h"