Merge branch 'jumpy' into 'master'

Don't run unstuck if there is no simulation running in async case (#5799)

See merge request OpenMW/openmw!548

apps/openmw/mwphysics/mtphysics.cpp

@@ -173,6 +173,8 @@ namespace MWPhysics
             {
             if (mDeferAabbUpdate)
                 updateAabbs();
+            if (!mRemainingSteps)
+                return;
             for (auto& data : mActorsFrameData)
                 if (data.mActor.lock())
                 {