[PATCH] Don't build Thread.pm if USEITHREADS

[Artur Bergman]

This patch turns of building of the Thread.pm if USEITHREADS is defined. As
it doesn't work there is no need building it.

Artur

--- Configure.old       Sat Jun  9 19:33:35 2001
+++ Configure        Sat Jun  9 20:13:40 2001
@@ -15985,8 +15985,11 @@
                esac
                ;;
        Thread|thread)
-               case "$usethreads" in
-               true|$define|y) avail_ext="$avail_ext $xxx" ;;
+               case "$usethreads" in
+               true|$define|y)
+                       case "$useithreads" in
+                       $undef|false|[nN]*) avail_ext="$avail_ext $xxx" ;;
+                       esac
                esac
                ;;
        IPC/SysV|ipc/sysv)