From 7d57e5aa451573bc0055e80ac18ad50c324002fa Mon Sep 17 00:00:00 2001
From: Nebuleon Fumika
Date: Mon, 7 Jan 2013 20:46:10 -0500
Subject: Require auto_equivalent_skip to be greater than 0 before decrementing
 it if the code is drawing a frame early in automatic frame skip mode.
 Otherwise, overflow occurs, and we skip 4 billion images.

---
 source/nds/entry.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/source/nds/entry.cpp b/source/nds/entry.cpp
index 63d736f..e272415 100644
--- a/source/nds/entry.cpp
+++ b/source/nds/entry.cpp
@@ -674,10 +674,10 @@ void S9xSyncSpeed ()
 			if (syncdif > 0)
 			{
 				// Are we VERY early? Say, 3 entire frames...
-				if (syncdif >= frame_time * 3)
+				if (syncdif >= frame_time * 3 && auto_equivalent_skip > 1)
 					auto_equivalent_skip -= 2;
 				// or one
-				else if (syncdif >= frame_time)
+				else if (syncdif >= frame_time && auto_equivalent_skip > 0)
 					auto_equivalent_skip--;
 				ds2_setCPUclocklevel(0);
 				udelay(syncdif * 128 / 3 /* times 42 + 2/3 microseconds */);
-- 
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