input: Write a python function to replace negative numbers with zero in a list.
  assert filter_negative([-1, 2, -3, 4, -5]) == [0, 2, 0, 4, 0]
  assert filter_negative([10, -20, 30, -40, 50]) == [10, 0, 30, 0, 50]
  assert filter_negative([-10, -20, -30, -40, -50]) == [0, 0, 0, 0, 0]
output: def filter_negative(lst):
      return [x if x >= 0 else 0 for x in lst]