[2.6 patch] USB iowarrior.c: fix check-after-use

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The Coverity checker spotted that we have already oops'ed if "dev"
was NULL.

Since "dev" being NULL doesn't seem to be possible here this patch 
removes the NULL check.

Signed-off-by: Adrian Bunk <[email protected]>

---
82a9906788e8bedc6d5adc54046e1713e4a399df 
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index 46d9f27..9930b0a 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -351,7 +351,7 @@ static ssize_t iowarrior_write(struct file *file,
 
 	mutex_lock(&dev->mutex);
 	/* verify that the device wasn't unplugged */
-	if (dev == NULL || !dev->present) {
+	if (!dev->present) {
 		retval = -ENODEV;
 		goto exit;
 	}
-
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