[a2ps] Avoid a bad free in the encoding handling logic (bug #954104).

[Tim Waugh]

commit 27cd62dcec8afe1284fdd1afd17bdf3ac7edade8
Author: Tim Waugh <twaugh at redhat.com>
Date:   Tue Apr 30 11:53:36 2013 +0100

    Avoid a bad free in the encoding handling logic (bug #954104).

 a2ps-bad-free.patch |   14 ++++++++++++++
 a2ps.spec           |    9 ++++++++-
 2 files changed, 22 insertions(+), 1 deletions(-)
---
diff --git a/a2ps-bad-free.patch b/a2ps-bad-free.patch
new file mode 100644
index 0000000..9f03b55
--- /dev/null
+++ b/a2ps-bad-free.patch
@@ -0,0 +1,14 @@
+diff -up a2ps-4.14/lib/encoding.c.bad-free a2ps-4.14/lib/encoding.c
+--- a2ps-4.14/lib/encoding.c.bad-free	2013-04-30 11:49:50.511962062 +0100
++++ a2ps-4.14/lib/encoding.c	2013-04-30 11:52:18.682573468 +0100
+@@ -541,7 +541,9 @@ encoding_resolve_font_substitute (struct
+     {
+       /* Find if there is a substitute for that font */
+       res = pair_get (encoding->substitutes, font_name);
+-      if (!res)
++      if (res)
++        res = xstrdup (res);
++      else
+ 	/* No. Check if this font is supported */
+ 	if (font_exists (job, font_name))
+ 	  /* Avoid returning sth alloca'd */
diff --git a/a2ps.spec b/a2ps.spec
index 20a8305..356db59 100644
--- a/a2ps.spec
+++ b/a2ps.spec
@@ -1,7 +1,7 @@
 Summary: Converts text and other types of files to PostScript
 Name: a2ps
 Version: 4.14
-Release: 19%{?dist}
+Release: 20%{?dist}
 License: GPLv3+
 Group: Applications/Publishing
 Source0: http://ftp.gnu.org/gnu/a2ps/%{name}-%{version}.tar.gz
@@ -23,6 +23,7 @@ Patch12: a2ps-4.13b-attr.patch
 Patch13: a2ps-4.13b-numeric.patch
 Patch14: a2ps-4.13b-encoding.patch
 Patch15: a2ps-4.13b-tilde.patch
+Patch16: a2ps-bad-free.patch
 Patch17: a2ps-4.13-euckr.patch
 Patch18: a2ps-4.13-gnusource.patch
 Patch20: a2ps-4.13-hebrew.patch
@@ -126,6 +127,9 @@ the emacs-%{name} package to use emacs-%{name} with GNU Emacs.
 # Fix koi8 tilde (bug #66393).
 %patch15 -p1 -b .tilde
 
+# Avoid a bad free in the encoding handling logic (bug #954104).
+%patch16 -p1 -b .bad-free
+
 # Add Korean resource file (bug #81421).
 %patch17 -p1 -b .euckr
 
@@ -305,6 +309,9 @@ exit 0
 %{_emacs_sitelispdir}/%{name}/*.el
 
 %changelog
+* Tue Apr 30 2013 Tim Waugh <twaugh at redhat.com> - 4.14-20
+- Avoid a bad free in the encoding handling logic (bug #954104).
+
 * Mon Apr 29 2013 Tim Waugh <twaugh at redhat.com> - 4.14-19
 - Support for building on aarch64 (bug #924962).