From 1c683f50a4622a60870ebd787e6339699a1225ba Mon Sep 17 00:00:00 2001
From: a_m0d <damien.schoof@gmail.com>
Date: Wed, 18 Apr 2012 22:57:47 -0400
Subject: [PATCH] Fix divide-by-zero error in vector:normalize() and
 vector:normalize_in_place()

---
 vector.lua | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/vector.lua b/vector.lua
index 8bde160..5ad2850 100644
--- a/vector.lua
+++ b/vector.lua
@@ -116,12 +116,14 @@ end
 
 function vector:normalize_inplace()
 	local l = self:len()
-	self.x, self.y = self.x / l, self.y / l
+	if l > 0 then self.x, self.y = self.x / l, self.y / l end
 	return self
 end
 
 function vector:normalized()
-	return self / self:len()
+    local l = self:len()
+    if l == 0 then return self end
+	return self / l
 end
 
 function vector:rotate_inplace(phi)