Improve armar7 platform movement

source/RobotAPI/components/units/RobotUnit/NJointControllers/NJointHolonomicPlatformVelocityControllerWithRamp.cpp

@@ -92,7 +92,7 @@ namespace armarx
                               rtGetControlStruct().velocityY,
                               rtGetControlStruct().velocityRotation);
 
-            if (x == Eigen::Vector3f::Zero())
+            if (x.norm() < 100)
             {
                 target->velocityX = 0;
                 target->velocityY = 0;