Fix item levels for set/quest-maps

Source/items.cpp

@@ -388,6 +388,21 @@ bool IsSuffixValidForItemType(int i, AffixItemType flgs)
 
 int ItemsGetCurrlevel()
 {
+	if (setlevel) {
+		switch (setlvlnum) {
+		case SL_SKELKING:
+			return Quests[Q_SKELKING]._qlevel;
+		case SL_BONECHAMB:
+			return Quests[Q_SCHAMB]._qlevel;
+		case SL_POISONWATER:
+			return Quests[Q_PWATER]._qlevel;
+		case SL_VILEBETRAYER:
+			return Quests[Q_BETRAYER]._qlevel;
+		default:
+			return 1;
+		}
+	}
+
 	if (leveltype == DTYPE_NEST)
 		return currlevel - 8;