* mmap.cc (mmap_record::page_map): Define as variable array rather than
as pointer.
(mmap_record::alloc_page_map): Remove.
(mmap_record::free_page_map): Remove.
(mmap_record::init_page_map): New method.
(mmap_record::add_record): Take mmap_record parameter by reference
rather than by value.
(mmap_record::map_pages): Fix comment.
(mmap_list::add_record): Allocate space for mmap_record including the
page_map in a single ccalloc call. Call init_page_map afterwards.
(mmap_list::del_record): Remove call to mmap_record::free_page_map.