V4L/DVB (8745): v4l2: fix a bunch of compile warnings.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/b2c2/flexcop-dma.c b/drivers/media/dvb/b2c2/flexcop-dma.c
index a91ed28..26f0011 100644
--- a/drivers/media/dvb/b2c2/flexcop-dma.c
+++ b/drivers/media/dvb/b2c2/flexcop-dma.c
@@ -10,7 +10,7 @@
 int flexcop_dma_allocate(struct pci_dev *pdev, struct flexcop_dma *dma, u32 size)
 {
 	u8 *tcpu;
-	dma_addr_t tdma;
+	dma_addr_t tdma = 0;
 
 	if (size % 2) {
 		err("dma buffersize has to be even.");