Fix roll braking assuming player angle is camera angle (resolves #1055)

This fixes being unable to brake during a roll while moving away from the camera in Automatic mode and while moving towards it in Old Analog mode.

Build (backup gamedata or else): srb2winroll.exe

If you don't notice the problem in vanilla due to the roll control being awful load the rphyslite file from here and try it: https://mb.srb2.org/addons/reveries.1401/download