Added checks in geffen magic tournament instance (#5669)

Fixed #5664 

Thanks to @mazvi

npc/custom/official/GeffenMagicTournament.txt

@@ -2247,13 +2247,14 @@ OnTimer10000:
 	
 	initnpctimer;
 	
-	if ('HomID != 0) {
+	if (unitexists('HomID) && unitexists('BossID)) {
 		getunitdata 'BossID,.@bossdata;
 		getunitdata 'HomID,.@homdata;
 			if (distance(.@bossdata[6],.@bossdata[7],.@homdata[6],.@homdata[7]) > 10) {
 				unittalk 'BossID,"Alphonse, come!";
 				sleep 500;
-				unitwarp 'HomID, instance_mapname("1@ge_st"),.@bossdata[6],.@bossdata[7];
+				if (unitexists('HomID))
+					unitwarp 'HomID, instance_mapname("1@ge_st"),.@bossdata[6],.@bossdata[7];
 			}
 	}
 	else {