Attempt to fix Clang build.

[mserajnik]

🍰 Pullrequest

Add a missing .c_str() to hopefully fix the Clang build, this is another regression introduced in 6f25c89:

/home/runner/work/core/core/src/game/Handlers/ChatHandler.cpp:57:163: error: cannot pass non-trivial object of type 'std::string' (aka 'basic_string<char>') to variadic method; expected type from format string was 'char *' [-Wnon-pod-varargs]
   57 |         sLog.Out(LOG_BASIC, LOG_LVL_ERROR, "Player %s (GUID: %u) sent a chatmessage with an invalid link: %s", GetPlayer()->GetName(), GetPlayer()->GetGUIDLow(), msg);
      |                                                                                                           ~~                                                      ^~~
/home/runner/work/core/core/src/game/Handlers/ChatHandler.cpp:57:163: note: did you mean to call the c_str() method?
   57 |         sLog.Out(LOG_BASIC, LOG_LVL_ERROR, "Player %s (GUID: %u) sent a chatmessage with an invalid link: %s", GetPlayer()->GetName(), GetPlayer()->GetGUIDLow(), msg);
      |                                                                                                                                                                   ^  
      |                                                                                                                                                                      .c_str()

Note: I don't have a Clang compiler setup, so this might only be a partial fix. This error surfaced when I rebased #2987 on the latest commit (since that triggered a Clang build); there may be other errors still that the build simply didn't get to before this one occurred.

Proof

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Issues

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How2Test

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Todo / Checklist

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