check length if list of index to avoid index out of bound error

[SmitaPatankar]

Python/MaxHeap.py

Line 18 in ba3e6e6

if self.heap[1]:

It is directly checked as if lst[1].
This will give error if index does not exist in lst.
Instead, we need to check if len(lst) >= 2 i.e. whether 1st element exists or not.

[Parthiv31]

Hey have created a pr with the required change
do consider , if not do consider saying why not
Thank you