improve terror zone

pkg/memory/terrorzones.go

@@ -5,14 +5,20 @@ import (
 )
 
 func (gd *GameReader) TerrorZones() (areas []area.ID) {
+	const maxActiveZoneCount = 16
+
 	structPtr := gd.moduleBaseAddressPtr + gd.offset.TZ
 	zonesPtr := uintptr(gd.ReadUInt(structPtr, Uint64))
 	actualActiveZoneCount := int(gd.ReadUInt(structPtr+0x8, Uint8))
+	if zonesPtr == 0 || actualActiveZoneCount <= 0 || actualActiveZoneCount > maxActiveZoneCount {
+		return nil
+	}
 
 	for i := 0; i < actualActiveZoneCount; i++ {
 		tzArea := gd.ReadUInt(zonesPtr+uintptr(i*Uint32), Uint32)
-		if tzArea != 0 {
-			areas = append(areas, area.ID(tzArea))
+		id := area.ID(tzArea)
+		if id.CanBeTerrorized() {
+			areas = append(areas, id)
 		}
 	}