fix the issue of mosvestage method in oxfordwrapper

OxfordExtenderWrapper/ExtenderWrapper.cs

@@ -408,6 +408,10 @@ namespace OxfordExtenderWrapper
         }
         public bool MoveStageXY(float x, float y)
         {
+            if ((m_dStageX - x < 0.001) && (m_dStageY - y < 0.001))
+            {
+                return true;
+            }
             currentCommand.moveStagePrm = new MoveStageParam();
             currentCommand.moveStagePrm.x = x;
             currentCommand.moveStagePrm.y = y;