If you try to lookup an object too early, you might find that the tbl is still a dict; this protects such early lookups from crashing

svn: r20813

gramps/gen/db/read.py

@@ -745,6 +745,7 @@ class DbBsddbRead(DbReadBase, Callback):
         return self.get_from_handle(handle, Tag, self.tag_map)
 
     def __get_obj_from_gramps_id(self, val, tbl, class_, prim_tbl):
+        if isinstance(tbl, dict): return None ## trying to get object too early        
         if isinstance(val, UNITYPE):
             val = val.encode('utf-8')
         try: