exit_number cleanup

[yakra]

• [ ] Set and advance a char*, a la 1dd479914e5368c13af6e618c02c21e5917ff9a0
• [ ] Clean up match->label indexing
• [ ] strncmp onto one line
• [ ] Nix list_name_size
• [ ] ~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?
• [ ] strncmp-based approach for exit number matches
  • [ ] char* [ ] nmbr_only; size_t nmbr_size
  • [ ] Do I go full-on&& c[nmbr_size] == ')' && !c[nmbr_size+1]), or keep it short with && !strcmp (c+nmbr_size, ")")?
  • [ ] Don't compare nmbr_only if !nmbr_size
• [ ] Combine adjacent continues where it's not a PitA
• [ ] Move // match with exit number in parens comments