installation unused warning fix

source/ubinstall-gtk.c

@@ -328,7 +328,9 @@ void *on_config_save(void *){
 
 void *yon_installation_start(main_window *widgets);
 void *yon_installation_start(main_window *widgets){
-    int code = system(start_fast_install_command);
+    if (system(start_fast_install_command)){
+        yon_ubl_status_box_spawn(GTK_CONTAINER(widgets->StatusBox),INSTALLATION_ERROR,5,BACKGROUND_IMAGE_FAIL_TYPE);
+    }
     // main_config.install_thread=NULL;
     main_config.install_complete=1;
         gtk_notebook_set_current_page(GTK_NOTEBOOK(widgets->Notebook),YON_PAGE_COMPLETION);

source/ubl-strings.h

@@ -113,4 +113,6 @@
 #define DOCUMENTATION_QUESTION_LABEL _("Would you like to read documentation in the Web?")
 #define DOCUMENTATION_HEAD_LABEL _("You will be redirected to documentation website where documentation is\ntranslated and supported by community.")
 #define DOCUMENTATION_CHECK_LABEL _("Always redirect to online documentation")
-#define OPEN_DOCUMENTATION_LABEL _("Open documentation")
+#define OPEN_DOCUMENTATION_LABEL _("Open documentation")
+
+#define INSTALLATION_ERROR _("Installation error")