retro_perf_callback crash fix

libretro / 81-libretro

A port of the EightyOne ZX81 Emulator to libretro

GNU General Public License v3.0

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Closed hiddenasbestos closed 6 years ago

hiddenasbestos commented 6 years ago

Fix for crash on shutdown if the front-end refuses a retro_perf_callback interface after RETRO_ENVIRONMENT_GET_PERF_INTERFACE call.