Fix error - decref wasn't needed
Fix error - decref wasn't needed

The list was just read during unpickling, only list's elements
are referenced inside the automaton.

Bug revealed in python compiled with option `--with-pydebug`.

WojciechMula/pyahocorasick,pombredanne/pyahocorasick,WojciechMula/pyahocorasick,WojciechMula/pyahocorasick,pombredanne/pyahocorasick,pombredanne/pyahocorasick,pombredanne/pyahocorasick,WojciechMula/pyahocorasick