function isNonPositiveFinite( x ) {
	return ( x <= 0.0 && x > NINF );
}
Tests if a double-precision floating-point numeric value is a nonpositive finite number.

@param {number} x - value to test
@returns {boolean} boolean indicating whether the value is a nonpositive finite number

@example
var bool = isNonPositiveFinite( -3.14 );
// returns true

@example
var bool = isNonPositiveFinite( 0.0 );
// returns true

@example
var bool = isNonPositiveFinite( -Infinity );
// returns false

@example
var bool = isNonPositiveFinite( 3.14 );
// returns false

@example
var bool = isNonPositiveFinite( NaN );
// returns false