Fix nilmdb-fsck issue caused by 022b50950f

nilmdb/server/bulkdata.py

@@ -297,7 +297,7 @@ class Table(object):
             pickle.dump(fmt, f, 2)
 
     # Normal methods
-    def __init__(self, root, initial_nrows):
+    def __init__(self, root, initial_nrows = 0):
         """'root' is the full OS path to the directory of this table"""
         self.root = root
         self.initial_nrows = initial_nrows