message: don't slide when go upside the ramp
diff: @@ -267,8 +267,6 @@ void MoveAlgo::tick(uint64_t dt, bool fai) {
  }
  else if(-fallThreshold<dY && dY<0.f) {
  if(testSlide(pos[0]+dp[0], pos[1]+dp[1]+fallThreshold, pos[2]+dp[2])) {
  - tryMove(dp[0],-dY,dp[2]);
  - setAsSlide(true);
  return;
  }
  // move up the ramp
  