[Crash] Potential crash fix in scan close mobs (#4744)

zone/entity.cpp

@@ -2231,7 +2231,7 @@ Raid* EntityList::GetRaidByBotName(const char* name)
 			}
 		}
 	}
-	
+
 	return nullptr;
 }
 
@@ -2933,7 +2933,7 @@ void EntityList::ScanCloseMobs(Mob *scanning_mob)
 	for (auto &e : mob_list) {
 		auto mob = e.second;
 
-		if (mob->GetID() <= 0) {
+		if (mob && mob->GetID() <= 0) {
 			continue;
 		}