From 8de0c23924430e32352bc1d4526f3d4f596b5142 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@users.sf.net>
Date: Thu, 6 Mar 2014 14:47:16 +0000
Subject: [PATCH] dont crash if save/loadstating 0 bytes of backup memory

---
 desmume/src/mc.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/desmume/src/mc.cpp b/desmume/src/mc.cpp
index 6d5d73ee4..c0664186e 100644
--- a/desmume/src/mc.cpp
+++ b/desmume/src/mc.cpp
@@ -119,7 +119,8 @@ bool BackupDevice::save_state(EMUFILE* os)
 	u32 savePos = fpMC->ftell();
 	std::vector<u8> data(fsize);
 	fpMC->fseek(0, SEEK_SET);
-	fread((char*)&data[0], 1, fsize, fpMC->get_fp());
+	if(data.size()!=0)
+		fread((char*)&data[0], 1, fsize, fpMC->get_fp());
 
 	u32 version = 5;
 	//v0
@@ -190,7 +191,8 @@ bool BackupDevice::load_state(EMUFILE* is)
 	fsize = data.size();
 #ifndef _DONT_SAVE_BACKUP
 	fpMC->fseek(0, SEEK_SET);
-	fwrite((char*)&data[0], 1, fsize, fpMC->get_fp());
+	if(data.size()!=0)
+		fwrite((char*)&data[0], 1, fsize, fpMC->get_fp());
 	ensure(data.size(), fpMC);
 #endif