ALSA: seq: remove redundant unsigned comparison to zero

Since struct snd_ump_block_info::first_group is unsigned char, comparison
to zero is redundant
Signed-off-by: Wang Weiyang <wangweiyang2@huawei.com>
Fixes: 81fd444a ("ALSA: seq: Bind UMP device")
Link: https://lore.kernel.org/r/20230721103124.18522-1-wangweiyang2@huawei.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/seq/seq_ump_client.c

@@ -298,8 +298,7 @@ static void update_group_attrs(struct seq_ump_client *client)
 	}
 
 	list_for_each_entry(fb, &client->ump->block_list, list) {
-		if (fb->info.first_group < 0 ||
-		    fb->info.first_group + fb->info.num_groups > SNDRV_UMP_MAX_GROUPS)
+		if (fb->info.first_group + fb->info.num_groups > SNDRV_UMP_MAX_GROUPS)
 			break;
 		group = &client->groups[fb->info.first_group];
 		for (i = 0; i < fb->info.num_groups; i++, group++) {