function isNonNegativeIntegerf( x ) {
	return Boolean( addon( x ) );
}
Tests if a finite single-precision floating-point number is a nonnegative integer.

@private
@param {number} x - value to test
@returns {boolean} boolean indicating whether the value is a nonnegative integer

@example
var bool = isNonNegativeIntegerf( 1.0 );
// returns true

@example
var bool = isNonNegativeIntegerf( -10.0 );
// returns false