Fix "cam2_turnmultiplier" being unused in "next"

This merge request fixes player 2 using player 1's "cam_turnmultiplier" instead of player 2's "cam2_turnmultiplier" in the next branch.

mentioned in merge request !711 (merged)

added Bug label

changed milestone to %2.2.1

merged

mentioned in commit 9677c9f0