typo (keon#811)

Author: mmooyyii

algorithms/tree/segment_tree/segment_tree.py

@@ -8,7 +8,7 @@ def __init__(self,arr,function):
  self.segment = [0 for x in range(3*len(arr)+3)]
  self.arr = arr
  self.fn = function
- self.maketree(0,0,len(arr)-1)
+ self.make_tree(0,0,len(arr)-1)
 
  def make_tree(self,i,l,r):
  if l==r: