Fix/send art poll even if no subscribed universe #103

Job	Run time
Build Test (WiFiS3): renesas_uno:unor4wifi	1m 17s
Build Test (ETH): esp32:esp32	2m 35s
Build Test (EtherENC): megaavr:uno2018	51s
Build Test (ETH): esp32:esp32s3	2m 45s
Build Test (Ethernet): avr:uno	51s
Build Test (EtherENC): samd:mkrwifi1010	1m 16s
Build Test (WiFi): esp8266:generic	1m 39s
Build Test (ETH): esp32:esp32c3	3m 8s
Build Test (Ethernet): megaavr:uno2018	58s
Build Test (EtherENC): samd:mkr1000	1m 18s
Build Test (WiFi): esp32:esp32	2m 28s
Build Test (WiFi): esp32:esp32s3	2m 45s
Build Test (EtherENC): samd:nano_33_iot	1m 16s
Build Test (WiFiNINA): megaavr:uno2018	56s
Build Test (EtherENC): esp8266:generic	1m 21s
Build Test (WiFiNINA): samd:mkrvidor4000	1m 13s
Build Test (Ethernet): samd:mkrvidor4000	1m 14s
Build Test (WiFi): esp32:esp32c3	2m 20s
Build Test (EtherENC): esp32:esp32	2m 11s
Build Test (WiFiNINA): samd:mkrwifi1010	1m 8s
Build Test (WiFi): rp2040:rpipicow	1m 55s
Build Test (Ethernet): samd:mkrwifi1010	1m 10s
Build Test (EtherENC): esp32:esp32s3	1m 51s
Build Test (WiFiNINA): samd:nano_33_iot	1m 13s
Build Test (Ethernet): samd:mkr1000	1m 10s
Build Test (EtherENC): esp32:esp32c3	1m 55s
Build Test (Ethernet): samd:nano_33_iot	1m 19s
Build Test (EtherENC): rp2040:rpipicow	1m 11s
Build Test (Ethernet): esp8266:generic	1m 21s
Build Test (Ethernet): esp32:esp32	1m 56s
Build Test (Ethernet): esp32:esp32s3	1m 44s
Build Test (Ethernet): esp32:esp32c3	1m 36s
Build Test (Ethernet): rp2040:rpipicow	1m 6s
	52m 57s

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