fixed a bug in inspect-stack that prevents stack info to be displayed
fixed a bug in inspect-stack that prevents stack info to be displayed

bl4ckic3/gef,firebitsbr/gef,wmliang/gef,jr64/gef,Ali-Razmjoo/gef,jr64/gef,hugsy/gef,hugsy/gef,Ali-Razmjoo/gef,hugsy/gef,wmliang/gef,bl4ckic3/gef,firebitsbr/gef