[PATCH] idmouse min() fix

This got caught by gcc on 64bit boxen - IMGSIZE is size_t and that means
range not covered by that of signed 64bit, so we get an unsigned type for
IMGSIZE-*ppos.  On 32bit boxen IMGSIZE-*ppos ends up being loff_t, so the
warning gets silenced.  
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/usb/misc/idmouse.c

@@ -296,7 +296,8 @@ static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count
 		return 0;
 	}
 
-	count = min ((loff_t)count, IMGSIZE - (*ppos));
+	if (count > IMGSIZE - *ppos)
+		count = IMGSIZE - *ppos;
 
 	if (copy_to_user (buffer, dev->bulk_in_buffer + *ppos, count)) {
 		result = -EFAULT;