[recipes] Silence a compiler warning

[Matthias Clasen <matthiasc src gnome org>]

commit 0a7ed0f689fce1759ebc2b7f1126205e68aff726
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Apr 1 15:34:50 2017 -0400

    Silence a compiler warning

 src/gr-app.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gr-app.c b/src/gr-app.c
index 966e6f5..1b11ba5 100644
--- a/src/gr-app.c
+++ b/src/gr-app.c
@@ -210,7 +210,7 @@ help_activated (GSimpleAction *action,
                 GVariant      *parameter,
                 gpointer       app)
 {
-        GList uris = { "help:org.gnome.Recipes", NULL, NULL };
+        GList uris = { (gpointer)"help:org.gnome.Recipes", NULL, NULL };
         g_autoptr(GAppInfo) info = NULL;
         g_autoptr(GError) error = NULL;