More regression test output tuning.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@10509 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/drd/tests/tc22_exit_w_lock.vgtest b/drd/tests/tc22_exit_w_lock.vgtest
index c57698e..f5ecbcd 100644
--- a/drd/tests/tc22_exit_w_lock.vgtest
+++ b/drd/tests/tc22_exit_w_lock.vgtest
@@ -1,2 +1,3 @@
 prereq: ./supported_libpthread
+vgopts: --num-callers=3
 prog: ../../helgrind/tests/tc22_exit_w_lock