[patch] wimax: wimax_msg_alloc() returns ERR_PTR not null

[inaky at linux.intel.com (Inaky Perez-Gonzalez)]

On Thu, 2010-04-22 at 11:46 +0200, Dan Carpenter wrote: 
> wimax_msg_alloc() returns an ERR_PTR and not null.  I changed it to test
> for ERR_PTR instead of null.  I also added a check in front of the
> kfree() because kfree() can handle null but not ERR_PTR.
> 
> Signed-off-by: Dan Carpenter <error27 at gmail.com>

Good catch thank you!

Will merge ASAP in preparation for the next push