Blender Git Loki

Fix: NLA, transition to Meta Strip uses wrong time

Copy correct time to temporary strips used for evaluation of NLA
Transition strips.

When a transition is placed next to a meta strip, the transition would
use the wrong strip time, using the time of the meta strip instead of
its own.

Reviewed by: sybren

Differential Revision: https://developer.blender.org/D8287