[Code] Add IsCloseToBanker method (#4462)

* [Code] Add IsCloseToBanker method

* Update mob.cpp

zone/mob.cpp

@@ -5491,7 +5491,7 @@ int Mob::GetHaste()
 		}
 	}
 	else {
-		h += spellbonuses.hastetype3; 
+		h += spellbonuses.hastetype3;
 	}
 
 	h += extra_haste;	//GM granted haste.
@@ -8611,3 +8611,15 @@ void Mob::SetExtraHaste(int haste, bool need_to_save)
 		}
 	}
 }
+
+bool Mob::IsCloseToBanker()
+{
+	for (auto &e: entity_list.GetCloseMobList(this)) {
+		auto mob = e.second;
+		if (mob && mob->IsNPC() && mob->GetClass() == Class::Banker) {
+			return true;
+		}
+	}
+
+	return false;
+}