Illegal serial packet size when using address length 3

[Yveaux]

According to NerdRalph:
I get "Illegal serial packet size" when I use address length 3:

c:\nrf24sniff -P16 -c2 -a0xc2c2c2 -l3 -C0 -v
Connect Wireshark to .\pipe\wireshark to continue...
Wait for sniffer to restart Ok

Channel: 2
Datarate: 1Mb/s
Address: 0xc2c2c2
Max payload: 32
CRC length: 0
Captured 0 packets, Lost 0 packets
Illegal serial packet size 12
0c 02 00 03 04 c2 c2 c2 00 00 00 00

I don't get the error when I use length 4. I have yet to get it to capture any packets though, despite the nrf24l01 seemingly receiving packets (IRQ trigger goes low).