Fix address calculation in Hurl.identity_map_range()

src/hulk/hurl/hurl.d

@@ -267,7 +267,7 @@ struct Hurl
     public static void identity_map_range(size_t address, size_t length, ulong flags)
     {
         size_t end = address + length;
-        for (size_t page = address & ~0xFFFu; page < end; page += PAGE_SIZE)
+        for (size_t page = address & 0xFFFF_FFFF_FFFF_F000u; page < end; page += PAGE_SIZE)
         {
             map(page, page, flags);
         }