Fix component order on a quaternion for the sit target. This caused

sit positions to be upside down until the script was reset.

OpenSim/Region/Environment/Scenes/SceneObjectPart.cs

@@ -821,7 +821,7 @@ namespace OpenSim.Region.Environment.Scenes
                                         );
             }
 
-            set { m_sitTargetOrientation = new Quaternion(value.W, value.X, value.Y, value.Z); }
+            set { m_sitTargetOrientation = new Quaternion(value.X, value.Y, value.Z, value.W); }
         }
 
         public bool Stopped