[media] saa7134: fix detection of external decoders

As warned by smatch:
	drivers/media/pci/saa7134/saa7134-core.c:840 saa7134_create_entities() info: ignoring unreachable code.
	drivers/media/pci/saa7134/saa7134-core.c:843 saa7134_create_entities() warn: curly braces intended?
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/saa7134/saa7134-core.c

@@ -838,9 +838,10 @@ static void saa7134_create_entities(struct saa7134_dev *dev)
 
 	/* Check if it is using an external analog TV demod */
 	media_device_for_each_entity(entity, dev->media_dev) {
-		if (entity->function == MEDIA_ENT_F_ATV_DECODER)
+		if (entity->function == MEDIA_ENT_F_ATV_DECODER) {
 			decoder = entity;
 			break;
+		}
 	}
 
 	/*