minimp3 library from https://github.com/lieff/minimp3
Fork https://github.com/manxorist/minimp3/releases/tag/openmpt-2025-11-07-v5
commit 2116754771b79347ad2f39127abace2a093c383e (2024-08-15)
The following changes have been made:
 *  minimp3.c has been added
 *  The following pull rquests have been merged:
     *  https://github.com/lieff/minimp3/pull/126
     *  https://github.com/lieff/minimp3/pull/96
     *  https://github.com/lieff/minimp3/pull/97
     *  https://github.com/lieff/minimp3/pull/125
     *  https://github.com/lieff/minimp3/pull/127
     *  https://github.com/lieff/minimp3/pull/132
 *  all modifications are marked by /* OpenMPT */
