look for nr_pages first

Signed-off-by: alam0rt <sam@samlockart.com>

Author: alam0rt

coredump/criu_coredump/coredump.py

@@ -794,7 +794,8 @@ def _get_page(self, pid, page_no):
         off = 0  # in pages
         for m in pagemap[1:]:
             found = False
-            for i in range(m["compat_nr_pages"]):
+            num_pages = m.get("nr_pages", m.compat_nr_pages)
+            for i in range(num_pages):
                 if m["vaddr"] + i * PAGESIZE == page_no * PAGESIZE:
                     found = True
                     break