fix wrapper

Author: soumith

tools/nnwrap/generate_wrappers.py

@@ -168,7 +168,7 @@ def wrap_generic():
  defs = OrderedDict()
 
  def should_wrap_function(name):
- if name.startswith('LookupTable'):
+ if name.startswith('LookupTable_'):
  return False
  return (name.endswith('updateOutput') or
  name.endswith('updateGradInput') or