[PATCH 1 of 3 stable] test-extension: changed environment variables must be exported again

[Mads Kiilerich]

# HG changeset patch
# User Mads Kiilerich <mads at kiilerich.com>
# Date 1272734686 -7200
# Branch stable
# Node ID c10763814dfed2755f4c3b54a945d6c08d6c1038
# Parent  e4f911ce21de5f8cee669da95774d4d8af261e96
test-extension: changed environment variables must be exported again

This fixes failure on Solaris because HGRCPATH wasn't unset.

diff --git a/tests/test-extension b/tests/test-extension
--- a/tests/test-extension
+++ b/tests/test-extension
@@ -156,6 +156,7 @@
 
 echo '% disabled extension commands'
 HGRCPATH=
+export HGRCPATH
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