From 54625bb7712cd0a3f819e2a0133aaf466a763f6e Mon Sep 17 00:00:00 2001
From: sanikoyes <sanikoyes@163.com>
Date: Tue, 22 Mar 2016 12:46:33 +0800
Subject: [PATCH] Fix GDScript crash when call show/hide in func _exit_tree

(cherry picked from commit 0c6f089ce4068c02514261c8a40e231c3779b9d5)
---
 scene/gui/control.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scene/gui/control.cpp b/scene/gui/control.cpp
index 295ec03702..e728a8807e 100644
--- a/scene/gui/control.cpp
+++ b/scene/gui/control.cpp
@@ -522,8 +522,8 @@ void Control::_notification(int p_notification) {
 
 			if (!is_visible()) {
 
-
-				get_viewport()->_gui_hid_control(this);
+				if(get_viewport() != NULL)
+					get_viewport()->_gui_hid_control(this);
 				_modal_stack_remove();
 				minimum_size_changed();