function isNegativeZero( value ) {
	return (
		isNumber( value ) &&
		( 1.0 / value.valueOf() ) === NINF
	);
}
Tests if a value is a number object having a value equal to negative zero.

@param {*} value - value to test
@returns {boolean} boolean indicating if a value is a number object having a value equal to negative zero

@example
var bool = isNegativeZero( -0.0 );
// returns false

@example
var bool = isNegativeZero( new Number( -0.0 ) );
// returns true