fix marpa_g_start_symbol() test
fix marpa_g_start_symbol() test

pczarn/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos,pczarn/kollos,pczarn/kollos,jeffreykegler/libmarpa,pczarn/kollos,pczarn/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos,jeffreykegler/kollos