Staging: crystalhd: remove an unneeded NULL check

We already established earlier in the function that "temp" is
non-NULL.  We also don't need to set to NULL because it's a stack
variable an we return immediately.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/crystalhd/crystalhd_lnx.c

@@ -255,10 +255,7 @@ static int chd_dec_api_cmd(struct crystalhd_adp *adp, unsigned long ua,
 		rc = chd_dec_proc_user_data(adp, temp, ua, 1);
 	}
 
-	if (temp) {
 	chd_dec_free_iodata(adp, temp, 0);
-		temp = NULL;
-	}
 
 	return rc;
 }