exit-intersection cleanup

[yakra]

• [ ] Set and advance a char*, a la 1dd479914e5368c13af6e618c02c21e5917ff9a0
• [ ] Clean up check->label indexing
• [ ] strncmp onto one line
• [ ] Combine adjacent continues where it's not a PitA
• [ ] Move // match with exit number in parens comments
• [ ] Nix list_name_size (already unused!)
• [ ] ~all_match~ -> goto next_exit; ;) Hey, will the compiler optimize this stuff? :D
• [ ] Extra credit: Or, can I accomplish the same thing using lambdas?
  • [ ] How does objdump compare?
• add_index loop:
  • [ ] indentation/whitespace/alignment?
  • [ ] indexing -> pointers?
  • [ ] invert conditional & nix continue?