message from zmodload can be corrupted

[takimoto-j@kba.biglobe.ne.jp]

I noticed that on recent Fedora's (and maybe many other Linuxes)
the error message returned by dlerror() is "localized" and
can contain multibyte characters depending on the locale in use.
THen the message is unmetafied in nicezputs() and corrupted.
For example, in Japanese locale:

zsh$ echo $LANG
ja_JP.UTF-8
zsh$ zmodload zsh/foo
zsh: failed to load module `zsh/foo': /usr/local/lib/zsh/4.3.12-test-2/zsh/foo.so: \M-e$\M-1\M-f\)オ\M-c^ジェク\M-c^H\M-c^_ァイ\M-c\M-^K\M-c\M-^B<\M-i~=\M-c\M-^A`ま\M-c\M-^A\\M-c\M-^B>: \M-c\M-^Aの\M-c\M-^B(\M-c\M-^A^な\M-c^_ァイ\M-c\M-^K\M-c\M-^B#\M-c\nィ\M-c\M-^Lク\M-c^H\M-c\M-\nはあ\M-c\M-^B$ま\M-c\M-^A\\M-c\M-^B>

The following patch fixes this problem, but I don't know whether I'm on
the right track.

zsh-fixed$ zmodload zsh/foo
zsh: failed to load module `zsh/foo': /usr/local/lib/zsh/4.3.12-test-2/zsh/foo.so: 共有オブジェクトファイルを開けません: そのようなファイルやディレクトリはありません


Index: Src/module.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/module.c,v
retrieving revision 1.43
diff -u -r1.43 module.c
--- Src/module.c	10 Aug 2011 11:31:19 -0000	1.43
+++ Src/module.c	27 Oct 2011 09:57:53 -0000
@@ -1597,7 +1597,9 @@
     ret = try_load_module(name);
     if (!ret && !silent) {
 #ifdef HAVE_DLERROR
-	zwarn("failed to load module `%s': %s", name, dlerror());
+	char *metafied = metafy(dlerror(),-1,META_DUP);
+	zwarn("failed to load module `%s': %s", name, metafied);
+	free(metafied);
 #else
 	zwarn("failed to load module: %s", name);
 #endif