Crash fix

source/ubinstall-gtk.c

@@ -760,8 +760,8 @@ void on_language_window_accept(GtkWidget *,dictionary *dict){
                 yon_char_parsed_add_or_create_if_exists(parsed,&size,current);
         }
         char *final = yon_char_parsed_to_string(parsed,size,"; ");
-        gtk_entry_set_text(GTK_ENTRY(widgets->AvailableLanguagesEntry),final);
+        gtk_entry_set_text(GTK_ENTRY(widgets->AvailableLanguagesEntry),!yon_char_is_empty(final)?final:"");
-        free(final);
+        if (final) free(final);
         yon_char_parsed_free(parsed,size);
     }
     on_subwindow_close(window->MainWindow);