From b1331433f7dd67ac9a260a6a520a6d6d2c8f3246 Mon Sep 17 00:00:00 2001
From: Danne <dab@users.sourceforge.net>
Date: Fri, 19 May 2000 14:41:10 +0000
Subject: [PATCH] Added checks for possible height=0 crashes to GL target too.

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

diff --git a/source/gl_screen.c b/source/gl_screen.c
index 1964930..a6dd82d 100644
--- a/source/gl_screen.c
+++ b/source/gl_screen.c
@@ -305,7 +305,7 @@ float CalcFov (float fov_x, float width, float height)
 
         x = width/tan(fov_x/360*M_PI);
 
-        a = atan (height/x);
+        a = (x == 0) ? 90 : atan(height/x); // 0 shouldn't happen
 
         a = a*360/M_PI;