put slist in ltdl namespace

[Ralf Wildenhues]

This is just a gentle reminder for Gary that, when he comes back,
he needs to look at this and decide whether it's ok like this.

(Probably either the prefix should be lt_, or strl* should have prefix
lt__ as well, but I haven't grokked Gary's idea of what the namespaces
ought to be.)

Against HEAD and branch-2-0.

Regards,
Ralf

        * libltdl/libltdl/slist.h: For libltdl, move all exported
        symbols into the lt__* namespace.

Index: libltdl/libltdl/slist.h
===================================================================
RCS file: /cvsroot/libtool/libtool/libltdl/libltdl/slist.h,v
retrieving revision 1.1.2.1
diff -u -r1.1.2.1 slist.h
--- libltdl/libltdl/slist.h     23 Nov 2004 12:47:19 -0000      1.1.2.1
+++ libltdl/libltdl/slist.h     16 Dec 2004 12:46:54 -0000
@@ -42,6 +42,19 @@
 
 #if defined(LTDL)
 #  include <libltdl/lt_system.h>
+#  define slist_concat lt__slist_concat
+#  define slist_cons   lt__slist_cons
+#  define slist_delete lt__slist_delete
+#  define slist_remove lt__slist_remove
+#  define slist_reverse        lt__slist_reverse
+#  define slist_sort   lt__slist_sort
+#  define slist_tail   lt__slist_tail
+#  define slist_nth    lt__slist_nth
+#  define slist_find   lt__slist_find
+#  define slist_length lt__slist_length
+#  define slist_foreach        lt__slist_foreach
+#  define slist_box    lt__slist_box
+#  define slist_unbox  lt__slist_unbox
 #else
 #  define LT_SCOPE
 #endif