Blender Git Loki

Freestyle: fix wrong arg order, and cleanup confusing loop (both reported by coverity).

Error: `origin` and `edge` args were swapped in final `FindOccludee()` call of `ViewMapBuilder::ComputeRayCastingVisibility()`

Cleanup: main for loop in `Strip::createStrip()` was really confusing (though correct),
generated a false positive in coverity scan, now should be cleaner how it loops over its vprev/v/v2
triplet of consecutive items.