Incorrect line number in diagnostics

[minexew]

E.g. the #error at https://github.com/tgstation/tgstation/blob/8b19b490d19cc63c694d95641527cb103108b425/code/_compile_options.dm#L76 is reported as being on line 72

[minexew]

This change seems to fix it (not that it makes the code any less shitty.)

byojs-archived@3cb8fd4