From 23163408131b077362439ec4f898d0ad3ce084e1 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Tue, 17 May 2011 19:03:11 +0200
Subject: Fix ShaderProgram double destroy()

---
 src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
index 2f40363d6..565b5ab1c 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/glsl/ShaderProgram.java
@@ -95,8 +95,10 @@ public class ShaderProgram {
         }
         allShaderCode.clear();
         attachedShaderCode.clear();
-        gl.glDeleteProgram(shaderProgram);
-        shaderProgram=-1;
+        if(0<=shaderProgram) {
+            gl.glDeleteProgram(shaderProgram);
+            shaderProgram=-1;
+        }
     }
 
     //
-- 
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