[Crash Fix] Fix Possible Crash in HateList::Find (#4027)

# Notes
- We were not doing any pointer validation, so we were causing crashes in some cases.
- Example: http://spire.akkadius.com/dev/release/22.43.2?id=19163

zone/hate_list.h

@@ -89,7 +89,7 @@ public:
 
 
 protected:
-	struct_HateList *Find(Mob *ent);
+	struct_HateList* Find(Mob* m);
 private:
 	std::list<struct_HateList *> list;
 	Mob                          *hate_owner;