Fix panic, triggered like this: "int main() { thr_exit(); }"

Submitted by:	Mateusz Guzik

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/kern/kern_thr.c b/sys/kern/kern_thr.c
index f283afb..ee0da02 100644
--- a/sys/kern/kern_thr.c
+++ b/sys/kern/kern_thr.c
@@ -317,13 +317,13 @@ sys_thr_exit(struct thread *td, struct thr_exit_args *uap)
 	rw_wlock(&tidhash_lock);
 
 	PROC_LOCK(p);
-	racct_sub(p, RACCT_NTHR, 1);
 
 	/*
 	 * Shutting down last thread in the proc.  This will actually
 	 * call exit() in the trampoline when it returns.
 	 */
 	if (p->p_numthreads != 1) {
+		racct_sub(p, RACCT_NTHR, 1);
 		LIST_REMOVE(td, td_hash);
 		rw_wunlock(&tidhash_lock);
 		tdsigcleanup(td);