Blender Git Loki

NLA: ignore time range when evaluating a raw action.

When editing an action without a strip, or tweaking a strip without
time mapping enabled or supported, the extents of the virtual strip
can't be controlled and are purely derived from keys in the action.

Thus, cutting off evaluation of the action at these arbitrary points
gets in the way of observing the natural extrapolation of the F-Curves
and thus appears to be a mis-feature.

With this change non-mapped actions are evaluated with infinite
range, exactly like they are handled without NLA, unless extend
mode is set to Nothing.