Merge branch 'fastforwardpos' into 'master'

Discard physics simulation results after fast forward

See merge request OpenMW/openmw!423

(cherry picked from commit ff2d7695698341ef059c75707aa092cef48deea4)

03a37433 In case of time fast forward (resting, jail), force reset of positions

apps/openmw/mwworld/worldimp.cpp

@@ -890,6 +890,7 @@ namespace MWWorld
         {
             mRendering->notifyWorldSpaceChanged();
             mProjectileManager->clear();
+            mDiscardMovements = true;
         }
     }