Get the minimum address out of all regions. We assume self._regions is sorted.

        :return: The minimum address.
        :rtype:  int

def _get_min_addr(self):
        """
        Get the minimum address out of all regions. We assume self._regions is sorted.

        :return: The minimum address.
        :rtype:  int
        """

        if not self._regions:
            if self.project.arch.name != "Soot":
                l.error("self._regions is empty or not properly set.")
            return None

        return next(self._regions.irange())