ALSA: seq: correctly report maximum number of ports
ALSA: seq: correctly report maximum number of ports

Due to SNDRV_SEQ_ADDRESS_BROADCAST, not all 256 port number values can
be used.

Signed-off-by: Clemens Ladisch <9f57ef5ff1095f40b1ee8b7caa363908baef59d7@ladisch.de>
Signed-off-by: Takashi Iwai <4596b3305151c7ee743192a95d394341e3d3b644@suse.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs