Fix freshman is ded Error case

Author: zedoax

packet/packet.py

@@ -4,6 +4,9 @@
 
 def sign(member_username, freshman_username):
     freshman = Freshman.query.filter_by(rit_username=freshman_username).first()
+    if freshman is None:
+        return False
+
     packet = freshman.current_packet()
     if packet is None:
         return False
@@ -19,6 +22,7 @@ def sign(member_username, freshman_username):
     else:
         db.session.add(MiscSignature(packet.id, member_username, datetime.now(), packet))
     db.session.commit()
+
     return True