[PATCH 4/9] sound: fix empty-body warning in vx_core.c

[Randy Dunlap]

Fix gcc empty-body warning when -Wextra is used:

../sound/drivers/vx/vx_core.c:515:3: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]

Signed-off-by: Randy Dunlap <rdunlap at infradead.org>
Cc: Jaroslav Kysela <perex at perex.cz>
Cc: Takashi Iwai <tiwai at suse.com>
Cc: alsa-devel at alsa-project.org
Cc: Linus Torvalds <torvalds at linux-foundation.org>
Cc: Andrew Morton <akpm at linux-foundation.org>
---
 sound/drivers/vx/vx_core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- linux-next-20200327.orig/sound/drivers/vx/vx_core.c
+++ linux-next-20200327/sound/drivers/vx/vx_core.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/firmware.h>
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/io.h>
 #include <sound/core.h>
@@ -512,7 +513,7 @@ irqreturn_t snd_vx_threaded_irq_handler(
 	 * received by the board is equal to one of those given to it).
 	 */
 	if (events & TIME_CODE_EVENT_PENDING)
-		; /* so far, nothing to do yet */
+		do_empty(); /* so far, nothing to do yet */
 
 	/* The frequency has changed on the board (UER mode). */
 	if (events & FREQUENCY_CHANGE_EVENT_PENDING)