function clampf( v, min, max ) {
	return addon( v, min, max );
}
Restricts a single-precision floating-point number to a specified range.

@private
@param {number} v - input value
@param {number} min - minimum value
@param {number} max - maximum value
@returns {number} value restricted to a specified range

@example
var v = clampf( 3.0, 0.0, 5.0 );
// returns 3.0

v = clampf( -3.0, 0.0, 5.0 );
// returns 0.0

v = clampf( 10.0, 0.0, 5.0 );
// returns 5.0

v = clampf( -0.0, 0.0, 5.0 );
// returns 0.0

v = clampf( 0.0, -0.0, 5.0 );
// returns 0.0

v = clampf( NaN, 0.0, 5.0 );
// returns NaN

v = clampf( 0.0, NaN, 5.0 );
// returns NaN

v = clampf( 3.14, 0.0, NaN );
// returns NaN