Blender Git Loki

BGE : Fix T43800: getScreenVect()/getScreenPosition()/modelview_matrix returns incorrect results

The getScreenVect(), getScreenPosition() and modelview_matrixmethod returns an incorrect results if called after the camera has been translated on the same frame.
The model view matrix will be update only once per frame with Cam->SetModelviewMatrix in KX_KetsjiEngine::RenderFrame.
Using GetWorldToCamera as model view matrix to get an actual view matrix even if the camera is moved.

Reviewers: sergey, dfelinto, brita_, sybren, hg1, campbellbarton

Reviewed By: hg1, campbellbarton

Projects: #game_engine

Differential Revision: https://developer.blender.org/D1170