[recipes] Simplify slightly

[Matthias Clasen <matthiasc src gnome org>]

commit ac2e7315f5e7ab559a3476743a07226e2731e746
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Mar 28 21:43:30 2017 +0100

    Simplify slightly
    
    Make this function as simple as it can be.

 src/gr-recipe-store.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)
---
diff --git a/src/gr-recipe-store.c b/src/gr-recipe-store.c
index e62c5ad..96aa028 100644
--- a/src/gr-recipe-store.c
+++ b/src/gr-recipe-store.c
@@ -1191,11 +1191,7 @@ gr_recipe_store_get_all_cuisines (GrRecipeStore *self,
 
         g_hash_table_iter_init (&iter, self->recipes);
         while (g_hash_table_iter_next (&iter, NULL, (gpointer *) &recipe)) {
-                if(! (g_hash_table_contains (cuisines, gr_recipe_get_cuisine (recipe)))) {
-                        g_hash_table_insert (cuisines,
-                                             (gpointer) (gr_recipe_get_cuisine (recipe)),
-                                             (gpointer) (gr_recipe_get_cuisine (recipe)));
-                }
+                g_hash_table_add (cuisines, (gpointer) (gr_recipe_get_cuisine (recipe)));
         }
         return (char **) g_hash_table_get_keys_as_array (cuisines, length);
 }