drd: Handle pthread_cond_destroy() failure properly

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13198 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/drd/drd_clientreq.c b/drd/drd_clientreq.c
index 8712764..4172c44 100644
--- a/drd/drd_clientreq.c
+++ b/drd/drd_clientreq.c
@@ -373,7 +373,7 @@
 
    case VG_USERREQ__POST_COND_DESTROY:
       if (DRD_(thread_leave_synchr)(drd_tid) == 0)
-         DRD_(cond_post_destroy)(arg[1]);
+         DRD_(cond_post_destroy)(arg[1], arg[2]);
       break;
 
    case VG_USERREQ__PRE_COND_WAIT: