auto.def: tclprefix should not be enabled by default

It is listed as not enabled by default, but it is enabled by default

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 1 insertions, 1 deletions

diff --git a/auto.def b/auto.def
index 0625264..e4f5279 100644
--- a/auto.def
+++ b/auto.def
@@ -326,7 +326,7 @@ dict set extdb attrs {
     stdlib    { tcl static }
     syslog    {}
     tclcompat { tcl static }
-    tclprefix {}
+    tclprefix { optional }
     tree      { tcl }
     win32     { optional }
 }