Fix server crashing when mapping a big number to character

[jezek]

It's not fully tested yet, but you told, that my old code is live, so I made this PR to fix the possible server crashes. I experienced these crashes, when tested the dynamic byte transfer for character and set the MAX_FONT to high number (>255*200). I was because the [fr]_char_mod variable used for unmapping for map mind linking, used to be an array of 256 chars. Now the char can be a 32 number, so I had to change the array to a dictionary(linked list).

Edit:I also took liberty to change the 5.0.0 in comments to 4.8.1. Edit: I just tested if it works for MAX_FONT with high values, so we had to transfer 3 or 4 bytes per character and it works. Hope I didn't introduced more errors.

[jezek]

I'm trying to test the map mind linking unmapping, but I can't figure out how it works. Can somebody test, or point me into some info? Thanks

Edit: I made a test, where I added code for unmapping to ordinary character transfer, to see if it unmaps correctly, and it seems to be working as expected. But real field test would be good too.

[CBlueGH]

Hm, mindlink still causes packet error here, I just tried it on a local server, with client+server cleanly compiled from latest source, and source+target clients both using latest source, tested client mindlink linux->linux and windows->windows.

[jezek]

@CBlueGH Oh crap. I apologize. My mistake was, that I forgot to change the PR #27 to draft again after @mhirki 's answers to my questions and than it was merged before I could test it fully. I'm sorry, I'll see that it never happens again.

I'll debug and fix the mindlink packet error this along with #29 .

[CBlueGH]

Well nothing terrible so far ^^ it can happen sometimes. I wonder how often I already broke everything.