From 693ce4d78fd832981eb1efb9207c532e9325d4de Mon Sep 17 00:00:00 2001
From: twinaphex <libretro@gmail.com>
Date: Thu, 8 May 2014 02:32:39 +0200
Subject: [PATCH] Do AV change only for vertical resolution changes -
 RETRO_SET_SYSTEM_AV_INFO is way too expensive to be abused like this - this
 is causing flashing in fullscreen mode for some video drivers

---
 libretro/libretro.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libretro/libretro.c b/libretro/libretro.c
index 6da64b5..1c4aa6e 100644
--- a/libretro/libretro.c
+++ b/libretro/libretro.c
@@ -475,7 +475,7 @@ static bool update_viewport(void)
       vheight = vheight * 2;
    }
 
-   return ((ow != vwidth) || (oh != vheight));
+   return (oh != vheight);
 }
 
 static void check_variables(void)