FIXED: CLP(B): Delay BDD restriction until after the instantiation.
FIXED: CLP(B): Delay BDD restriction until after the instantiation.

This is necessary to actually take the new value into account.

Example:

    ?- sat(A*B>=C*D), A=1,B=0,C=1,D=1.
    false.

This addresses #670.

mthom/rusty-wam