Fix the problem where plugins decide to re-enter if they are exited

using a menu


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12708 a1c6a512-1295-4272-9138-f99709370657

apps/plugin.c

@@ -641,6 +641,7 @@ int plugin_load(const char* plugin, void* parameter)
     lcd_remote_clear_display();
     lcd_remote_update();
 #endif
+    action_signalscreenchange();
 
     if (pfn_tsr_exit == NULL)
         plugin_loaded = false;