snd_hda_intel and Asus F3Jv problem on 2.6.19

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Hello,

I have a problem when the module loads on my F3Jv :

Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:
 [<ffffffff88053cd5>] :snd_hda_codec:get_input_type+0x77/0x9f

When looking at the code, there is really a problem. Code making trouble was 
introduced by patch "hda-codec - Fix mic capture with generic parser"
Details :
changeset 4486: 	e917e2de6efa
parent 4485:	dc9d57a416b5
child 4487:	c0ade5c872e4
author: 	tiwai
date: 	Wed Aug 23 18:34:06 2006 +0200
files: 	pci/hda/hda_generic.c

In file hda_generic.c, in function build_loopback_controls there is a call to 
get_input_type with NULL parameter, and in get_input_type there is :
*pinctl |= AC_PINCTL_VREF_80;

So the module crash on load on my laptop.
A simple fix can be to test if pointer is NULL, but I 'm not sure what it 
implies. The fix makes the module work (with sound), but I can't test with a 
mic (I guess it is related)

I don't know if its right or not but I have only 2 entries in the mixer, I 
have to check in Windows.

I can provide more informations if needed

Thanks
Arnaud Lech

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