Morgan Wallen Chatting Up Woman Minutes Before Hurling Chair Off Rooftop

Morgan Wallen allegedly tossing a chair off a rooftop is the last thing anyone would expect ... based on new images of him casually chatting up a woman Sunday night, just moments before he wound up in handcuffs. Photos obtained by TMZ show the country star minutes before the chair-chucking incident ... and as you can see, he was talking to the woman in a black miniskirt. We're told the man in the red and black…