fix for small step on zero

src/desk-controller.cpp

@@ -268,7 +268,7 @@ LinakDesk::doDeskControl(void)
 				}
 			} while (m_finished == true);
 			uint delta = abs(m_currentHeight - target_height);
-			m_smallStep = (delta <= STOP_DELAY) ? true : false;
+			m_smallStep = (delta <= STOP_DELAY) && (delta != 0)? true : false;
 		}
 		else if (target_height <= (m_currentHeight + STOP_DELAY) && target_height > m_currentHeight && m_smallStep)
 		{
@@ -300,7 +300,7 @@ LinakDesk::doDeskControl(void)
 			bool state = move(Command::up);
 			usleep(10000);
 		}
-		else
+		else 
 		{
 			cout << "down" << endl;
 			bool state = move(Command::down);