function nanmaxf( x, y ) {
	return addon( x, y );
}
Returns the maximum value of two single-precision floating-point numbers, ignoring NaN.

@private
@param {number} x - first number
@param {number} y - second number
@returns {number} maximum value

@example
var v = nanmaxf( 3.14, 4.2 );
// returns ~4.2

@example
var v = nanmaxf( 4.14, NaN );
// returns ~4.14

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