From 4f58c076d46eca78949f80739fd6b0722daf4ff7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois=20Boulogne?= <fboulogne sciunto org>
Date: Wed, 2 Oct 2013 16:17:42 +0200
Subject: [PATCH] FIX: import M_PI

---
 skimage/transform/_hough_transform.pyx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/skimage/transform/_hough_transform.pyx b/skimage/transform/_hough_transform.pyx
index 21f6daf7..2d09751f 100644
--- a/skimage/transform/_hough_transform.pyx
+++ b/skimage/transform/_hough_transform.pyx
@@ -7,7 +7,7 @@ import numpy as np
 cimport numpy as cnp
 cimport cython
 
-from libc.math cimport abs, fabs, sqrt, ceil
+from libc.math cimport abs, fabs, sqrt, ceil, M_PI
 from libc.stdlib cimport rand
 
 from skimage.draw import circle_perimeter