Binary operators "and", "not", "or" failing on integers

[niveditasonker]

Code for XOR fires error- Attempting to NOT non-boolean value

function xor(a as integer, b as integer) as integer
    if a = 0 then return b
    if b = 0 then return a
    return ((a and not b) or (not a and b))
end function

[lvcabral]

Duplicate of #457