From 1d021a72c7a1245adeceecd706dbebfb739f6247 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Mon, 30 May 2016 15:08:42 -0700
Subject: [PATCH] GB Memory: Fix null deref when rumbling

---
 src/gb/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gb/memory.c b/src/gb/memory.c
index d42e4c682..df08311ec 100644
--- a/src/gb/memory.c
+++ b/src/gb/memory.c
@@ -721,7 +721,7 @@ void _GBMBC5(struct GBMemory* memory, uint16_t address, uint8_t value) {
 		break;
 	case 0x4:
 	case 0x5:
-		if (memory->mbcType == GB_MBC5_RUMBLE) {
+		if (memory->mbcType == GB_MBC5_RUMBLE && memory->rumble) {
 			memory->rumble->setRumble(memory->rumble, (value >> 3) & 1);
 			value &= ~8;
 		}