added safety check for indexing when inserting the expert item into the loot list

Author: SheepishShepherd

BossLogUI.cs

@@ -1639,8 +1639,14 @@ private void OpenLoot() {
 			}
 
 			// the expert item should appear after the master mode collectibles
-			if (GetLogEntryInfo.ExpertItem > 0 && !bossItems.Contains(GetLogEntryInfo.ExpertItem))
-				bossItems.Insert((int)CollectibleType.Trophy, GetLogEntryInfo.ExpertItem);
+			if (GetLogEntryInfo.ExpertItem > 0 && !bossItems.Contains(GetLogEntryInfo.ExpertItem)) {
+				if (bossItems.Count >= (int)CollectibleType.Trophy) {
+					bossItems.Insert((int)CollectibleType.Trophy, GetLogEntryInfo.ExpertItem);
+				}
+				else {
+					bossItems.Add(GetLogEntryInfo.ExpertItem);
+				}
+			}
 
 			// finally, the rest of the drops are added (including the generic collectibles)
 			foreach (DropRateInfo drop in bossDrops) {