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ref: 7d6c1ae035e709bf25e49f5cdcc7bec151eb5018 parent: 2d02bdb9269fad274a163369af27789a72cecb40 author: Turo Lamminen <turol@iki.fi> date: Sat Aug 28 12:56:14 EDT 2021
opl: Fix const correctness issue in I_OPL_InitMusic