[Patch] - fix sip.chat.without.presence

[Vadim Lebedev]

Ralf Schlatterbeck wrote:
> Chat without presence -- even if enabling sip.chat.without.presence did
> not work for me when no presence info is available from the
> infrastructure. The presence score in this case is 0 and the contact is
> not found at all. This sets the initial score to -1 so that even if the
> score is 0 the "best" contact is returned.
>   
Applied