More efficiently reap zombeis in spawn.go

internal/lib/spawn.go

@@ -61,7 +61,11 @@ func (c *MyConfig) CleanZombies() {
 	r := syscall.Rusage{}
 
 	for {
-		_, _ = syscall.Wait4(-1, nil, syscall.WNOHANG, &r)
+		pid, _ := syscall.Wait4(-1, nil, syscall.WNOHANG, &r)
+
+		if pid > 0 {
+			continue
+		}
 
 		time.Sleep(1 * time.Minute)
 	}