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>

drivers/media/common/saa7146_core.c

@@ -234,7 +234,7 @@ void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt)
 int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt)
 {
 	__le32       *cpu;
-	dma_addr_t   dma_addr;
+	dma_addr_t   dma_addr = 0;
 
 	cpu = pci_alloc_consistent(pci, PAGE_SIZE, &dma_addr);
 	if (NULL == cpu) {

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.");

drivers/media/video/btcx-risc.c

@@ -64,7 +64,7 @@ int btcx_riscmem_alloc(struct pci_dev *pci,
 		       unsigned int size)
 {
 	__le32 *cpu;
-	dma_addr_t dma;
+	dma_addr_t dma = 0;
 
 	if (NULL != risc->cpu && risc->size < size)
 		btcx_riscmem_free(pci,risc);

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

@@ -215,7 +215,7 @@ unsigned long saa7134_buffer_base(struct saa7134_buf *buf)
 int saa7134_pgtable_alloc(struct pci_dev *pci, struct saa7134_pgtable *pt)
 {
 	__le32       *cpu;
-	dma_addr_t   dma_addr;
+	dma_addr_t   dma_addr = 0;
 
 	cpu = pci_alloc_consistent(pci, SAA7134_PGTABLE_SIZE, &dma_addr);
 	if (NULL == cpu)