get_int_member_with_default

Convenience function that retrieves the integer value stored in member_name of this.

If member_name does not exist, does not contain a scalar value, or contains `null`, then default_value is returned instead.

Parameters:

this	a JSON object
member_name	the name of the object member
default_value	the value to return if member_name is not valid

Returns:

the integer value of the object's member, or the given default