Fix regression due to GlueGen commit c3054a01990e55ab35756ea23ab7d7c05f24dd37, completes JOGL commit 68ca3ae8fcce28c62034299bc6e6f7eaab50bd1f

Add handling of 'initializeImpl()' of generated GLU* classes:
  - GLU      : no 'initializeImpl()' <- no libs
  - GLUgl2es1: no 'initializeImpl()' <- no libs
  - GLUgl:     call 'initializeImpl()' in manual static init impl.

Further more, we shall not initialize the GLU* classes in GLU
static init method, querying GLU* class availability.

Tested via OlympicES1.

1 files changed, 7 insertions, 2 deletions

diff --git a/make/config/jogl/glu-CustomJavaCode-base.java b/make/config/jogl/glu-CustomJavaCode-base.java
index 21d6277e9..48fe31329 100644
--- a/make/config/jogl/glu-CustomJavaCode-base.java
+++ b/make/config/jogl/glu-CustomJavaCode-base.java
@@ -83,11 +83,16 @@ static {
     Class _gl2Class=null;
     Class _gl2es1Class=null;
     try {
-        _gl2Class = Class.forName("javax.media.opengl.glu.gl2.GLUgl2");
-        _gl2es1Class = Class.forName("javax.media.opengl.glu.gl2es1.GLUgl2es1");
+        final ClassLoader cl = GLU.class.getClassLoader();
+        _gl2Class = Class.forName("javax.media.opengl.glu.gl2.GLUgl2", false, cl);
+        _gl2es1Class = Class.forName("javax.media.opengl.glu.gl2es1.GLUgl2es1", false, cl);
     } catch (Throwable t) {}
     gl2Class = _gl2Class;
     gl2es1Class = _gl2es1Class;
+    /** No native code, not required nor possible
+    if( !initializeImpl() ) {
+        throw new RuntimeException("Initialization failure");
+    } */
 }
 
 /**