gnu: vigra: Update to a development snapshot.

* gnu/packages/image.scm (vigra): Update to a git snapshot to fix build
  problems with the current python-numpy.

gnu/packages/image.scm

@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2015 Andreas Enge <andreas@enge.fr>
+;;; Copyright © 2013, 2015, 2016 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2014, 2015, 2016 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com>
 ;;; Copyright © 2014 Ricardo Wurmus <rekado@elephly.net>
@@ -44,6 +44,7 @@
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (guix download)
+  #:use-module (guix git-download)
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system cmake)
   #:use-module (srfi srfi-1))
@@ -545,16 +546,20 @@ graphics image formats like PNG, BMP, JPEG, TIFF and others.")
    (home-page "http://freeimage.sourceforge.net")))
 
 (define-public vigra
+  (let ((commit "a378732"))
     (package
      (name "vigra")
-   (version "1.10.0")
+     (version (string-append "1.10.0-1-" commit))
      (source
       (origin
-       (method url-fetch)
-       (uri (string-append "https://hci.iwr.uni-heidelberg.de/vigra/vigra-"
-                           version "-src.tar.gz"))
-       (sha256 (base32
-                 "16d0jvz3k49niljg9qvvlyxxl15yk0300xkymvyznlmvn1hs7m22"))))
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/ukoethe/vigra.git")
+             (commit commit)))
+       (file-name (string-append name "-" version))
+       (sha256
+        (base32
+          "0gvbfrnss1vnkmajsv716yy317j4mx5kn1rxrblxqqyghws47jm5"))))
      (build-system cmake-build-system)
      (inputs
       `(("boost" ,boost)
@@ -596,7 +601,7 @@ processing and analysis library that puts its main emphasis on customizable
 algorithms and data structures.  It is particularly strong for
 multi-dimensional image processing.")
      (license license:expat)
-   (home-page "https://hci.iwr.uni-heidelberg.de/vigra")))
+     (home-page "https://hci.iwr.uni-heidelberg.de/vigra"))))
 
 (define-public libwebp
   (package