Fix the crash caused by out-of-bounds writes in survival mode (with lua)

[userwljs]

The bug manifests as follows: when a Witch is present and Lua is used, a rare SIGILL occurs in Debug builds, while SIGSEGV occurs frequently in Release builds.

teeworlds-infclassR/src/game/server/infclass/ic_gamecontroller.cpp

Line 2773 in 0f94bcb

pConf->BotConfigurations.Add(SurvivalBotConfiguration{.Class = PlayerClass});

and icArray::Add lack bounds checking. The CIcGameController::SurvivalAddBot method is frequently called by Lua and similarly lacks bounds checking. When the element count reaches MaxBotsPerWave (128), calling this method causes out-of-bounds writes.

[userwljs]

Hi @Kaffeine,

If you have time, could you please take a look at this PR?

Thanks for your work on this project!