Suppress Code 0x0000 in RDS group A

[andimik]

I have realized that the Websocket transmits the Code 0x0000 in RDS group A (= PI Code), although there is no station here with this (test only) code.

G:
5214------------

G:
0000------------

G:
0000------------

G:
5214------------

G:
0000----86C9----

G:
52146548----2044

Could you suppress this or replace by ---- because this leads to wrong logs? See screenshot from RDSSpy.

rdssocket.txt

[ryanginn]

Maybe something to be looked into @mrwish7