ALSA: lx6464es - make 1 bit signed bitfield unsigned

converts a 1 bit signed bitfield to an unsigned.

Reported-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Tim Blechmann <tim@klingt.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/lx6464es/lx6464es.h b/sound/pci/lx6464es/lx6464es.h
index 51afc04..aea621e 100644
--- a/sound/pci/lx6464es/lx6464es.h
+++ b/sound/pci/lx6464es/lx6464es.h
@@ -60,7 +60,7 @@
 	snd_pcm_uframes_t          frame_pos;
 	enum lx_stream_status      status; /* free, open, running, draining
 					    * pause */
-	int                        is_capture:1;
+	unsigned int               is_capture:1;
 };