small fix

theano/compile/profiling.py

@@ -647,6 +647,8 @@ class ProfileStats(object):
                     if hasattr(out.type, 'get_size'):
                         v = out.type.get_size(sh)
                         sum_dense += v
+                    else:
+                        v = 'Unknow'
                 else:
                     v = 'Variable not created'