Method addActivityAlien

src/Savegame/Country.cpp:134–137

* Adds to the country's alien activity level. * @param activity how many points to add. */

 * @param activity how many points to add.
 */
void Country::addActivityAlien(int activity)
{
	_activityAlien.back() += activity;
}

/**
 * Gets the country's xcom activity level.