V4L/DVB (4740): Fixed an if-block to avoid floating with debug-messages

The dbgarg() macro in videodev.c contains some printk() statements
where only the first one is influenced by an if-statement. This causes
floating with debug-messages which is fixed by this patch by adding a
'{ ... }' pair.
Signed-off-by: Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/videodev.c

@@ -17,10 +17,11 @@
  */
 
 #define dbgarg(cmd, fmt, arg...) \
-		if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)			\
+		if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {		\
 			printk (KERN_DEBUG "%s: ",  vfd->name);		\
 			v4l_printk_ioctl(cmd);				\
-			printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg);
+			printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg); \
+		}
 
 #define dbgarg2(fmt, arg...) \
 		if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)			\