Eliminate race condition where many callers would check SOP.PhysicsActor != null then assume it was still not null in later code.

Another thread could come and turn off physics for a part (null PhysicsActor) at any point.
Had to turn off localCopy on warp3D CoreModules section in prebuild.xml since on current nant this copies all DLLs in bin/ which can be a very large number with compiled DLLs
No obvious reason for doing that copy - nothing else does it.

1 files changed, 2 insertions, 1 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index 8a05772..0098add 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -306,7 +306,8 @@ namespace OpenSim.Region.Framework.Scenes
             if (rot != null)
                 sceneObject.UpdateGroupRotationR((Quaternion)rot);
 
-            if (sceneObject.RootPart.PhysActor != null && sceneObject.RootPart.PhysActor.IsPhysical && vel != Vector3.Zero)
+            PhysicsActor pa = sceneObject.RootPart.PhysActor;
+            if (pa != null && pa.IsPhysical && vel != Vector3.Zero)
             {
                 sceneObject.RootPart.ApplyImpulse((vel * sceneObject.GetMass()), false);
                 sceneObject.Velocity = vel;