[PATCH] utils: Adding a function to get volume from string

[arun.raghavan@xxxxxxxxxxxxxxx (Arun Raghavan)]

On Thu, 2012-10-25 at 19:18 +0200, Dalleau, Frederic wrote:
> Hi folks,
> 
> This patch triggers the following error on my computer :
> ./.libs/libpulsecommon-2.98.so: undefined reference to `pa_sw_volume_from_dB'
> Build is fine at previous commit.

I just pushed out a fix for this (commit 4171df301).

-- Arun