fixed potential nil pointer

csgo/demo_parser.go

@@ -166,6 +166,10 @@ func (p *DemoParser) getMatchPlayerBySteamID(stats []*ent.MatchPlayer, steamId u
 }
 
 func setMatchPlayerColor(matchPlayer *ent.MatchPlayer, demoPlayer *common.Player) {
+	if matchPlayer == nil || demoPlayer == nil {
+		return
+	}
+
 	matchPlayer.Crosshair = demoPlayer.CrosshairCode()
 	switch demoPlayer.Color() {
 	case common.Yellow: