Fixes a possible quest log mistake (#5996)

The player could end up the quest with quest ID 8101 in log

Thanks to @KrokusPokus !

Co-authored-by: Aleos <aleos89@users.noreply.github.com>

npc/quests/quests_rachel.txt

@@ -7250,8 +7250,8 @@ OnTouch:
 		set ra_tem_q,19;
 		if (isbegin_quest(8102) == 1)
 			changequest 8102,8103;
-		else
-			setquest 8103;
+		else if (isbegin_quest(8101) == 1)
+			changequest 8101,8103;
 		close;
 	}
 	end;