From c7486609fa26626beca76e1f018a120ee406f14d Mon Sep 17 00:00:00 2001
From: degasus <wickmarkus@web.de>
Date: Thu, 9 May 2013 10:17:12 +0200
Subject: [PATCH] fix underflow in IndexGenerator::AddFan

fix issue 6282

The Last Story seems to render a fan with two vertices. It is non-sense as it
shouldn't do anything, but the code underflows at (u32)numVerts-3
---
 Source/Core/VideoCommon/Src/IndexGenerator.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Source/Core/VideoCommon/Src/IndexGenerator.cpp b/Source/Core/VideoCommon/Src/IndexGenerator.cpp
index 15b2311f89..3970d8c82f 100644
--- a/Source/Core/VideoCommon/Src/IndexGenerator.cpp
+++ b/Source/Core/VideoCommon/Src/IndexGenerator.cpp
@@ -142,7 +142,7 @@ template <bool pr> void IndexGenerator::AddFan(u32 numVerts)
 	
 	if(pr)
 	{
-		for(; i<=numVerts-3; i+=3)
+		for(; i+3<=numVerts; i+=3)
 		{
 			*Tptr++ = index + i - 1;
 			*Tptr++ = index + i + 0;
@@ -153,7 +153,7 @@ template <bool pr> void IndexGenerator::AddFan(u32 numVerts)
 			numT += 3;
 		}
 		
-		for(; i<=numVerts-2; i+=2)
+		for(; i+2<=numVerts; i+=2)
 		{
 			*Tptr++ = index + i - 1;
 			*Tptr++ = index + i + 0;