zkfuse: remove applied patch

pkgs/servers/zookeeper/default.nix

···
 { stdenv, fetchurl, jre, makeWrapper, bash }:
 
 stdenv.mkDerivation rec {
-  name = "zookeeper-3.4.9";
+  name = "zookeeper-${version}";
+  version = "3.4.9";
 
   src = fetchurl {
     url = "mirror://apache/zookeeper/${name}/${name}.tar.gz";

pkgs/tools/filesystems/zkfuse/default.nix

···
 { stdenv, lib, zookeeper, zookeeper_mt, fuse, pkgconfig, autoreconfHook, log4cxx, boost, tree }:
 
 stdenv.mkDerivation rec {
-  name = "zkfuse";
+  name = "zkfuse-${version}";
+  inherit (zookeeper) version src;
 
-  src = zookeeper.src;
-  patches = [
-    # see: https://issues.apache.org/jira/browse/ZOOKEEPER-1929
-    ./zookeeper-1929.patch
-  ];
-
-  setSourceRoot = "export sourceRoot=${zookeeper.name}/src/contrib/zkfuse";
+  sourceRoot = "${zookeeper.name}/src/contrib/zkfuse";
 
   buildInputs = [ autoreconfHook zookeeper_mt log4cxx boost fuse ];
 

pkgs/tools/filesystems/zkfuse/zookeeper-1929.patch

···
-diff --git a/src/contrib/zkfuse/src/zkadapter.cc b/src/contrib/zkfuse/src/zkadapter.cc
-index 886051d..93dbef5 100644
---- a/src/zkadapter.cc
-+++ b/src/zkadapter.cc
-@@ -845,7 +845,10 @@ ZooKeeperAdapter::getNodeData(const string &path,
-             string("Unable to get data of node ") + path, rc 
-         );
-     } else {
--        return string( buffer, buffer + len );
-+        if (len == -1) {
-+            len = 0;
-+        };
-+        return string( buffer, len );
-     }
- }