From c0d0eb9dd0ffc1165e035abe1eb9bae94b3839ce Mon Sep 17 00:00:00 2001
From: Vicki Pfau <vi@endrift.com>
Date: Tue, 17 Aug 2021 16:16:23 -0700
Subject: [PATCH] Libretro: Fix crash when using Game Boy codes (fixes #2281)

---
 CHANGES                          | 1 +
 src/platform/libretro/libretro.c | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index 13109f5fe..0b83173ea 100644
--- a/CHANGES
+++ b/CHANGES
@@ -6,6 +6,7 @@ Emulation fixes:
 Other fixes:
  - GB Video: Fix memory leak when reseting SGB games
  - GBA: Fix out of bounds ROM accesses on patched ROMs smaller than 32 MiB
+ - Libretro: Fix crash when using Game Boy codes (fixes mgba.io/i/2281)
  - Qt: Remove potentially deadlocking optimization
 
 0.9.2: (2021-07-10)
diff --git a/src/platform/libretro/libretro.c b/src/platform/libretro/libretro.c
index aad9fba7e..25c465dbc 100644
--- a/src/platform/libretro/libretro.c
+++ b/src/platform/libretro/libretro.c
@@ -871,7 +871,9 @@ void retro_cheat_set(unsigned index, bool enabled, const char* code) {
 		}
 	}
 #endif
-	cheatSet->refresh(cheatSet, device);
+	if (cheatSet->refresh) {
+		cheatSet->refresh(cheatSet, device);
+	}
 }
 
 unsigned retro_get_region(void) {