Libretro: Fix a memory leak with the render buffer

CHANGES

@@ -7,6 +7,7 @@ Bugfixes:
  - GBA Video: Start on the scanline BIOS finishes on if no BIOS is loaded
  - GBA: Deinit savegame when unloading a ROM
  - GBA: Fix BIOS check on big endian
+ - Libretro: Fix a memory leak with the render buffer
 Misc:
  - Qt: Remove useless help icons in dialogs
  - GBA: Attempting to save a screenshot-style savestate should be allowed without libpng

src/platform/libretro/libretro.c

@@ -204,6 +204,7 @@ void retro_deinit(void) {
 		bios = 0;
 	}
 	GBADestroy(&gba);
+	free(renderer.outputBuffer);
 }
 
 void retro_run(void) {