commit 74577741c856c145811061a438d5a52ea7055f39
from: Russ Cox <rsc@swtch.com>
date: Wed Dec 30 13:12:04 2020 UTC

tcolors: add threadmaybackground

commit - 0ed5e9f828757a17995e0550f285a11c1ff27026
commit + 74577741c856c145811061a438d5a52ea7055f39
blob - 9aa4de7980962ee5f1b00c8d5c28143e995099e8
blob + 056749470a83889934ad7b051f6cc0fbcd8200b6
--- src/cmd/draw/tcolors.c
+++ src/cmd/draw/tcolors.c
@@ -44,6 +44,12 @@ dither[16] =  {
 
 extern int chattydrawclient;
 
+int
+threadmaybackground(void)
+{
+	return 1;
+}
+
 void
 threadmain(int argc, char *argv[])
 {