audio state set during gui setup if necessary

completes work started in 4bb7862

Author: JetSetIlly

gui/ebiten/audio.go

@@ -22,10 +22,12 @@ func (a *audioPlayer) setState(state gui.State) {
 	a.crit.Lock()
 	defer a.crit.Unlock()
 	a.state = state
-	if state == gui.StatePaused {
-		a.p.Pause()
-	} else {
-		a.p.Play()
+	if a.p != nil {
+		if state == gui.StatePaused {
+			a.p.Pause()
+		} else {
+			a.p.Play()
+		}
 	}
 }
 

gui/ebiten/gui.go

@@ -321,6 +321,11 @@ func Launch(endGui <-chan bool, g *gui.ChannelsGUI, update func() error) error {
 	for !done {
 		select {
 		case eg.state = <-g.State:
+			// audio player is not ready yet so we don't really need to push the state change as we
+			// do in the main update loop. however, we do so anyway in case something changes above
+			// and we forget about this. there's no harm or performance penalty in setting the state
+			// like this
+			eg.audio.setState(eg.state)
 			done = true
 		case <-endGui:
 			return nil