fix obs build

Change-Id: Ia70486a0c6b813829ffd633f5334945f73d3b628
Reviewed-by: Lorn Potter <lorn.potter@jollamobile.com>
send first proximity signal even when it's "closed".

This fixes a bug where the proximity sensor would send the initial
signal only when it was not closed. This will send it regardless.

Change-Id: I5f388e671091ae2a7719f700a049cea41bfaa0db
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>