GF-9659: Make totalTime to have actual value.
GF-9659: Make totalTime to have actual value.

In previous code, totalTime could be NaN, so it could influence the
value of playheadPos.

Enyo-DCO-1.1-Signed-off-by: David Um <david.um@lge.com>

mcanthony/moonstone,mcanthony/moonstone,enyojs/moonstone,mcanthony/moonstone