gnu: xf86-video-nv: Update to 2.1.20.

* gnu/packages/patches/xf86-video-nv-remove-mibstore.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/xorg.scm (xf86-video-nv): Update to 2.1.20.  Add patch.

gnu-system.am

@@ -467,6 +467,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/xf86-video-intel-glibc-2.20.patch	\
   gnu/packages/patches/xf86-video-mach64-glibc-2.20.patch	\
   gnu/packages/patches/xf86-video-mga-glibc-2.20.patch		\
+  gnu/packages/patches/xf86-video-nv-remove-mibstore.patch	\
   gnu/packages/patches/xf86-video-openchrome-includes.patch	\
   gnu/packages/patches/xfce4-panel-plugins.patch		\
   gnu/packages/patches/xmodmap-asprintf.patch

gnu/packages/patches/xf86-video-nv-remove-mibstore.patch

@@ -0,0 +1,72 @@
+Removes references to mibstore.h and miInitializeBackingStore, which
+have been removed from xorg-server.  Zack Rusin <zackr@vmware.com>
+wrote: "It was a noop for at least 5 years and it has been removed."
+See: http://patches.openembedded.org/patch/46133/
+
+diff -ru xf86-video-nv-2.1.20.orig/src/g80_driver.c xf86-video-nv-2.1.20/src/g80_driver.c
+--- xf86-video-nv-2.1.20.orig/src/g80_driver.c	2012-07-17 02:47:02.000000000 -0400
++++ xf86-video-nv-2.1.20/src/g80_driver.c	2014-12-17 10:11:42.197579082 -0500
+@@ -34,7 +34,6 @@
+ #include <xf86Resources.h>
+ #endif
+ #include <mipointer.h>
+-#include <mibstore.h>
+ #include <micmap.h>
+ #include <xf86cmap.h>
+ #include <fb.h>
+@@ -833,7 +832,6 @@
+         }
+     }
+ 
+-    miInitializeBackingStore(pScreen);
+     xf86SetBackingStore(pScreen);
+     xf86SetSilkenMouse(pScreen);
+ 
+diff -ru xf86-video-nv-2.1.20.orig/src/nv_driver.c xf86-video-nv-2.1.20/src/nv_driver.c
+--- xf86-video-nv-2.1.20.orig/src/nv_driver.c	2012-07-17 02:47:02.000000000 -0400
++++ xf86-video-nv-2.1.20/src/nv_driver.c	2014-12-17 10:11:39.037563413 -0500
+@@ -2550,7 +2550,6 @@
+     if (!pNv->NoAccel)
+ 	NVAccelInit(pScreen);
+     
+-    miInitializeBackingStore(pScreen);
+     xf86SetBackingStore(pScreen);
+     xf86SetSilkenMouse(pScreen);
+ 
+diff -ru xf86-video-nv-2.1.20.orig/src/nv_include.h xf86-video-nv-2.1.20/src/nv_include.h
+--- xf86-video-nv-2.1.20.orig/src/nv_include.h	2012-07-17 02:48:19.000000000 -0400
++++ xf86-video-nv-2.1.20/src/nv_include.h	2014-12-17 10:11:22.089479372 -0500
+@@ -24,9 +24,6 @@
+ /* All drivers initialising the SW cursor need this */
+ #include "mipointer.h"
+ 
+-/* All drivers implementing backing store need this */
+-#include "mibstore.h"
+-
+ #include "micmap.h"
+ 
+ #include "xf86DDC.h"
+diff -ru xf86-video-nv-2.1.20.orig/src/riva_driver.c xf86-video-nv-2.1.20/src/riva_driver.c
+--- xf86-video-nv-2.1.20.orig/src/riva_driver.c	2012-07-17 02:47:02.000000000 -0400
++++ xf86-video-nv-2.1.20/src/riva_driver.c	2014-12-17 10:11:31.101524060 -0500
+@@ -1168,7 +1168,6 @@
+     if (!pRiva->NoAccel)
+ 	RivaAccelInit(pScreen);
+     
+-    miInitializeBackingStore(pScreen);
+     xf86SetBackingStore(pScreen);
+     xf86SetSilkenMouse(pScreen);
+ 
+diff -ru xf86-video-nv-2.1.20.orig/src/riva_include.h xf86-video-nv-2.1.20/src/riva_include.h
+--- xf86-video-nv-2.1.20.orig/src/riva_include.h	2012-07-17 02:48:45.000000000 -0400
++++ xf86-video-nv-2.1.20/src/riva_include.h	2014-12-17 10:11:12.229430478 -0500
+@@ -22,9 +22,6 @@
+ /* All drivers initialising the SW cursor need this */
+ #include "mipointer.h"
+ 
+-/* All drivers implementing backing store need this */
+-#include "mibstore.h"
+-
+ #include "micmap.h"
+ 
+ #include "xf86DDC.h"

gnu/packages/xorg.scm

@@ -2742,17 +2742,18 @@ kernel mode setting (KMS).")
 (define-public xf86-video-nv
   (package
     (name "xf86-video-nv")
-    (version "2.1.18")
+    (version "2.1.20")
     (source
       (origin
         (method url-fetch)
         (uri (string-append
-               "mirror://xorg/X11R7.7/src/everything/xf86-video-nv-"
+               "mirror://xorg/individual/driver/xf86-video-nv-"
                version
                ".tar.bz2"))
         (sha256
           (base32
-            "05glbi9jc7j9nm4sf4qvl3z87s48ibm3i283lqz85kbphg62dxvc"))))
+           "1gqh1khc4zalip5hh2nksgs7i3piqq18nncgmsx9qvzi05azd5c3"))
+        (patches (list (search-patch "xf86-video-nv-remove-mibstore.patch")))))
     (build-system gnu-build-system)
     (inputs `(("xorg-server" ,xorg-server)))
     (native-inputs `(("pkg-config" ,pkg-config)))