#13 overloaded logical operators

[Gabriel Dos Reis]

overloaded logical operators don't work in
both the interpreter and the compiler.

(1) ->
(1) -> a := 2::OutputForm
(1) ->
(1) 2
Type: OutputForm
(2) -> b := 4::OutputForm
(2) ->
(2) 4
Type: OutputForm
(3) -> a and b
3) ->
Argument number 1 to "and" must be a Boolean.

[Gabriel Dos Reis]

Logged In: YES
user_id=1496011
Originator: YES

Fixed.