Fixes handling of while loop during pass

[anutosh491]

Fixes #1569

def f():                                            
    j :i32 = 0
    while True:
        j = j + 1
        print(j)
        if(j>4):
            break
    print("out of outer loop")
f()

On Branch

(lp) C:\Users\kunni\lpython>lpython try.py
1
2
3
4
5
out of outer loop

On Master

(lp) C:\Users\kunni\lpython>src\bin\lpython try.py
1
2
3
4
5
5
5
out of outer loop