commit fdcf3d70c24886dddb5fd7052dfada67d33d5c75
from: Russ Cox <rsc@swtch.com>
date: Thu Jan 14 14:58:44 2021 UTC

auxstats: do not postnote 0

commit - 1c845e0bd5ff897dc5e90f2c24db4ecd81a8f60c
commit + fdcf3d70c24886dddb5fd7052dfada67d33d5c75
blob - 3fd77ac4c42d5150a2c833fc6f54679ae67fd8ae
blob + a37c9723e5df394e982a377c0bfb4f169ff13264
--- src/cmd/auxstats/main.c
+++ src/cmd/auxstats/main.c
@@ -21,7 +21,8 @@ notifyf(void *v, char *msg)
 
 	if(strstr(msg, "child"))
 		noted(NCONT);
-	postnote(PNPROC, pid, msg);
+	if(pid)
+		postnote(PNPROC, pid, msg);
 	exits(nil);
 }