Change type of channel speed variable from "int" to "u_int32_t" to

avoid overflow when scaling playback rate.  Fixes 44.1k playback from
being 48k (I am deaf to this difference...).

sys/dev/sound/pci/vibes.c

@@ -58,8 +58,8 @@ struct sc_chinfo {
 	struct sc_info	*parent;
 	pcm_channel	*channel;
 	snd_dbuf	*buffer;
+	u_int32_t	fmt, spd;
 	int		dir;
-	int		fmt, spd;
 	int		dma_active, dma_was_active;
 };