fix beacons in chrome 48
fix beacons in chrome 48

for some reason , chrome 48 does not know how to handle with left/top
with a lot of digits after the point. the round fix it

OBSLabs/openvv,jdreetz/openvv,jdreetz/openvv,OBSLabs/openvv,OBSLabs/openvv,jdreetz/openvv