fix the err about getCard(QString) @todo
Wrong arguments for overloaded function 'Engine_getCard'
  Possible C/C++ prototypes are:
    Engine::getCard(int) const
    Engine::getCard(QString const &) const

askForCard
stack traceback:
	lua/ai/smart-ai.lua:118: in function <lua/ai/smart-ai.lua:110>
Event stack:
End of Event Stack