[patch] quote language related variables in case they have garbage

[Mike Frysinger]

if you set a language variable with quotes or semicolons or other weird
things, you may get ugly warnings/errors when indirectly evaluating them.

2008-03-16  Mike Frysinger  <address@hidden>

        * libltdl/config/ltmain.m4sh (NLS nuisances): Quote vars when setting.

Index: libltdl/config/ltmain.m4sh
===================================================================
RCS file: /cvsroot/libtool/libtool/libltdl/config/ltmain.m4sh,v
retrieving revision 1.97
diff -u -p -r1.97 ltmain.m4sh
--- libltdl/config/ltmain.m4sh  28 Jan 2008 15:49:46 -0000      1.97
+++ libltdl/config/ltmain.m4sh  16 Mar 2008 07:32:18 -0000
@@ -99,7 +99,7 @@ DUALCASE=1; export DUALCASE # for MKS sh
 for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES
 do
   eval "if test \"\${$lt_var+set}\" = set; then
-          save_$lt_var=\$$lt_var
+          save_$lt_var=\"\$$lt_var\"
           $lt_var=C
          export $lt_var
        fi"
@@ -1717,7 +1717,7 @@ func_mode_execute ()
       for lt_var in LANG LANGUAGE LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES
       do
        eval "if test \"\${save_$lt_var+set}\" = set; then
-                $lt_var=\$save_$lt_var; export $lt_var
+                $lt_var=\"\$save_$lt_var\"; export $lt_var
              else
                $lt_unset $lt_var
              fi"