From 9d2ca33b5b125d3e17573584bcc401ba98687f76 Mon Sep 17 00:00:00 2001
From: Themaister <maister@archlinux.us>
Date: Fri, 9 Nov 2012 20:26:12 +0100
Subject: [PATCH] Do not attempt to start rewind if state_size is 0.

---
 retroarch.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/retroarch.c b/retroarch.c
index bc9aa342f5..6c737deac1 100644
--- a/retroarch.c
+++ b/retroarch.c
@@ -1408,6 +1408,11 @@ static void init_rewind(void)
       return;
 
    g_extern.state_size = pretro_serialize_size();
+   if (!g_extern.state_size)
+   {
+      RARCH_ERR("Implementation does not support save states. Cannot use rewind.\n");
+      return;
+   }
 
    // Make sure we allocate at least 4-byte multiple.
    size_t aligned_state_size = (g_extern.state_size + 3) & ~3;