CHROMIUM: verity: remove dead code in dm_bht_verify_path

CHROMIUM: verity: remove dead code in dm_bht_verify_path

The depth == 0 check is no longer necessary as depth can never
be zero at this point. We check depth > 0 at the top of the while
loop and only decrement depth at the bottom and before the continue.

BUG=9752
TEST= Ran dm-verity.git unit tests. Ran platform_DMVerityCorruption on H/W.

Change-Id: Ie3854a2b71b36ea4cb6b2114e298f6a424f707b5
Signed-off-by: Mandeep Singh Baines <msb@chromium.org>;

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=acafb2e

[Mandeep Singh Baines, 2011-02-09 02:23:27]

ping

[Will Drewry, 2011-02-11 19:37:36]

LGTM

as per the other cl, that code is unreachable, so it's a nop :)

[Will Drewry, 2011-02-11 19:38:09]

Btw, weren't there some other issues that came out of that now dead cl? :/

[Mandeep Singh Baines, 2011-02-11 21:22:34]

wad@chromium.org (wad@chromium.org) wrote:
> Btw, weren't there some other issues that came out of that now dead cl? :/
> 

I think the issues were all in the CL and not in the existing code. Kinda
embarassed by that CL now. Not sure what I was thinking. But I'll double
check the CL to be sure.

> http://codereview.chromium.org/6286102/