function minabs( x, y ) {
	return min( abs( x ), abs( y ) );
}
Returns the minimum absolute value.

@param {number} x - first number
@param {number} y - second number
@returns {number} minimum absolute value

@example
var v = minabs( -3.14, 4.2 );
// returns 3.14

@example
var v = minabs( 3.14, NaN );
// returns NaN

@example
var v = minabs( +0.0, -0.0 );
// returns +0.0