From 6e72569ce2e9cf1ff5c76413fedff3df6e22a45c Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Wed, 18 Apr 2012 19:30:29 +0800
Subject: [PATCH] fix: check nil argument in blitFullFrom method

---
 screen.lua | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/screen.lua b/screen.lua
index f7c9b3f6c..3dd0ebfae 100644
--- a/screen.lua
+++ b/screen.lua
@@ -100,5 +100,9 @@ function Screen:getCurrentScreenBB()
 end
 
 function Screen:restoreFromBB(bb)
-	fb.bb:blitFullFrom(bb)
+	if bb then
+		fb.bb:blitFullFrom(bb)
+	else
+		debug("Got nil bb in restoreFromSavedBB!")
+	end
 end