ALSA: trivial: sound seq ioctl dbg: print hexadecimal value padded with 0s

Instead of padding with blanks and printing "number=0x a", print
"number=0x0a".

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 8ca2be3..48eca9f 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -2190,7 +2190,7 @@
 		if (p->cmd == cmd)
 			return p->func(client, arg);
 	}
-	snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%2x)\n",
+	snd_printd("seq unknown ioctl() 0x%x (type='%c', number=0x%02x)\n",
 		   cmd, _IOC_TYPE(cmd), _IOC_NR(cmd));
 	return -ENOTTY;
 }