Fixed layout variants saving

source/ubl-settings-keyboard-layouts.c

@@ -22,7 +22,7 @@ void on_layouts_chosen(GtkCellRenderer *, gchar *path, layouts_window *window){
 
     char *full_layout = NULL;
     if (!yon_char_is_empty(variant)){
-        yon_char_unite(layout,"_",variant,NULL);
+        full_layout = yon_char_unite(layout,"_",variant,NULL);
     } else {
         full_layout = layout;
     }