iconv.m4: fix message

[Bruno Haible]

The output from AM_ICONV looks like this with autoconf 2.64:

checking for iconv declaration... install-shextern size_t iconv (iconv_t cd, 
char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);

The reason is the use of an obsolete variable ac_t (from autoconf 2.13!).


2009-08-03  Bruno Haible  <address@hidden>

        * m4/iconv.m4 (AM_ICONV): Fix displayed message with autoconf-2.64.

--- m4/iconv.m4.orig    2009-08-03 23:03:26.000000000 +0200
+++ m4/iconv.m4 2009-08-03 22:55:59.000000000 +0200
@@ -1,4 +1,4 @@
-# iconv.m4 serial AM7 (gettext-0.18)
+# iconv.m4 serial AM8 (gettext-0.18)
 dnl Copyright (C) 2000-2002, 2007-2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -172,8 +172,8 @@
 ], [], [am_cv_proto_iconv_arg1=""], [am_cv_proto_iconv_arg1="const"])
       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, 
$am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, 
size_t *outbytesleft);"])
     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( 
/(/'`
-    AC_MSG_RESULT([${ac_t:-
-         }$am_cv_proto_iconv])
+    AC_MSG_RESULT([
+         $am_cv_proto_iconv])
     AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
       [Define as const if the declaration of iconv() needs const.])
   fi