Reordered tipOpenImminent reset in closeTooltip().
Reordered tipOpenImminent reset in closeTooltip().

Fixes issue #14.

erthalion/jquery-powertip,erthalion/jquery-powertip,stevenbenner/jquery-powertip,stevenbenner/jquery-powertip,jasco/jquery-powertip,jasco/jquery-powertip