[Bots] Fix rule Bots:FinishBuffing (#4788)

common/spdat_bot.cpp

@@ -468,3 +468,19 @@ uint16 GetPetBotSpellType(uint16 spell_type) {
 
 	return spell_type;
 }
+
+bool IsBotBuffSpellType(uint16 spell_type) {
+	switch (spell_type) {
+		case BotSpellTypes::Buff:
+		case BotSpellTypes::PetBuffs:
+		case BotSpellTypes::ResistBuffs:
+		case BotSpellTypes::PetResistBuffs:
+		case BotSpellTypes::DamageShields:
+		case BotSpellTypes::PetDamageShields:
+			return true;
+		default:
+			return false;
+	}
+
+	return false;
+}