bug in appadmin cache

[RekGRpth]

UnboundLocalError: local variable 'value' referenced before assignment

        for key in cache.disk.storage:
            if key == 'web2py_cache_statistics' and isinstance(value[1], dict):

[RekGRpth]

solve

diff --git a/controllers/appadmin.py b/controllers/appadmin.py
index 73303f5..a602a95 100644
--- a/controllers/appadmin.py
+++ b/controllers/appadmin.py
@@ -465,6 +465,7 @@ def ccache():
             ram['keys'].append((key, GetInHMS(time.time() - value[0])))

         for key in cache.disk.storage:
+            value = cache.disk.storage[key]
             if key == 'web2py_cache_statistics' and isinstance(value[1], dict):
                 disk['hits'] = value[1]['hit_total'] - value[1]['misses']
                 disk['misses'] = value[1]['misses']

[ilvalle]

@mdipierro #1555 has been merged, this issue can be close