V4L: possible leak in em28xx_init_isoc

Coverity (CID 1929) spotted the following: if a transfer buffer allocation fails, the last allocated urb is leaked (it hasn't been stored in dev->urb[] yet so em28xx_uninit_isoc misses it). The patch also includes a small typo fix.

---

drivers/media/video/em28xx/em28xx-core.c | 3 ++-

1 file changed, 2 insertions(+), 1 deletion(-)

index d3282ec..d56484f 100644
@@ -648,7 +648,7 @@ void em28xx_uninit_isoc(struct em28xx *dev)
 */

int em28xx_init_isoc(struct em28xx *dev)
{
- /* change interface to 3 which allowes the biggest packet sizes */
+ /* change interface to 3 which allows the biggest packet sizes */

	int i, errCode;
	const int sb_size = EM28XX_NUM_PACKETS * dev->max_pkt_size;

@@ -673,6 +673,7 @@ int em28xx_init_isoc(struct em28xx *dev)

					("unable to allocate %i bytes for transfer buffer %i\n",
					 sb_size, i);
			em28xx_uninit_isoc(dev);
+			usb_free_urb(urb);
			return -ENOMEM;
		}
		memset(dev->transfer_buffer[i], 0, sb_size);