memleak fix

engine/gamemap/level.go

@@ -49,6 +49,7 @@ func (l *Level) Put (x, y int, tileFunc interface{}) {
 
 func NewLevel(ctx util.ClientCtx, branch string, depth int) *Level {
 	l := &Level{
+		ctx: ctx,
 		Name:     branch + string(depth),
 		Depth:    depth,
 		Rect: types.NewRect(0,0, mapWidth, mapHeight),

engine/gamestate/gamestate.go

@@ -21,6 +21,7 @@ func (g *GameState) Do(f func()) {
 	done := make(chan struct{}, 1)
 	g.Mainfunc <- func() {
 		f()
+		f = nil //zero pointer for closure function
 		done <- struct{}{}
 	}
 	<-done