streamripper garbles characters in media info when substutiting

1) Ubuntu release:
Description: Ubuntu 12.04.3 LTS
Release: 12.04

2) package version:
streamripper:
  Installed: 1.64.6-1
  Candidate: 1.64.6-1
  Version table:
 *** 1.64.6-1 0
        500 http://de.archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages
        100 /var/lib/dpkg/status
3) expected behavior:
using substitution rules in rules.txt, track titles for files to be written can be modified as documented

4) actual behavior:
about one in 10 track titles contains garbage characters like '?'

5) reason:
in lib/parse.c:611, g_strconcat is called with incorrect parameters (read from beyond allocated memory, valgrind points to this too)

6) proposed solution:
Apply patch from bombela: http://sourceforge.net/p/streamripper/code/ci/2f7c359d13a6985882ec65afaaf7637b52aceb2a/

additionally, memory is leaked for every substitution: g_free(subst_string); is missing, please add

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: streamripper 1.64.6-1
ProcVersionSignature: Ubuntu 3.2.0-57.87-generic 3.2.52
Uname: Linux 3.2.0-57-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Sat Dec 7 20:33:20 2013
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: streamripper
UpgradeStatus: No upgrade log present (probably fresh install)