This fixes a number of things that are warnings in the Mac compiler....

core/cross/gl/renderer_gl.cc

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 510 matching lines @@
   }
 };
 
 RendererGL* RendererGL::CreateDefault(ServiceLocator* service_locator) {
   return new RendererGL(service_locator);
 }
 
 RendererGL::RendererGL(ServiceLocator* service_locator)
     : Renderer(service_locator),
       semantic_manager_(service_locator),
-#ifdef OS_MACOSX
-      mac_agl_context_(0),
-      mac_cgl_context_(0),
-#endif
 #ifdef OS_WIN
       gl_context_(NULL),
 #endif
+      fullscreen_(0),
 #ifdef OS_LINUX
       display_(NULL),
       window_(0),
       context_(0),
 #endif
-      fullscreen_(0),
+#ifdef OS_MACOSX
+      mac_agl_context_(0),
+      mac_cgl_context_(0),
+#endif
       render_surface_framebuffer_(0),
       cg_context_(NULL),
       alpha_function_ref_changed_(true),
       alpha_function_(GL_ALWAYS),
       alpha_ref_(0.f),
       alpha_blend_settings_changed_(true),
       separate_alpha_blend_enable_(false),
       stencil_settings_changed_(true),
       separate_stencil_settings_enable_(false),
       stencil_ref_(0),
@@ skipping 1037 matching lines @@
   return swizzle_table;
 }
 
 // This is a factory function for creating Renderer objects.  Since
 // we're implementing GL, we only ever return a GL renderer.
 Renderer* Renderer::CreateDefaultRenderer(ServiceLocator* service_locator) {
   return RendererGL::CreateDefault(service_locator);
 }
 
 }  // namespace o3d