S3_0: Unused variable loaded_players at legacysave.c
Unused variable loaded_players at legacysave.c gives an error with clang-15. Only in S3_0.
Should fix all similar "unused variable" clang-15 errors.
- Also S2_6 version
Unused variable loaded_players at legacysave.c gives an error with clang-15. Only in S3_0.