Found while doing Win32 port

Hi,
Currently I'm trying to understand the filter feature of aspell
0.60. I tried to put some debug code in to understand what
happend to the filters I configured.
I found this in string_list.hpp

  class StringList : public MutableContainer {
 <some stuff here>
    unsigned int size() const { abort(); return 0; }
  };

Is there any reason for this?

Thanks,
Gary